Global Summit Guide · St. Elias Mountains, Alaska
Ultimate Guide to Climbing Mount Bona: Routes, Gear & Safety
Complete expedition guide: East Ridge via Klutlan Glacier, Chitina & McCarthy access, double summit with Mt. Churchill, and the highest volcano in the United States at 16,421 feet.
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Ultimate Mount Bona Expedition Guide: East Ridge, Klutlan Glacier & Logistics
Mount Bona holds a distinction shared by no other peak in the United States: it is the highest volcano in the country — and the fourth-highest volcano in all of North America, surpassed only by the three great Mexican volcanoes (Pico de Orizaba, Popocatép etl, and Iztaccíhuatl). At 16,421 feet it is one of the most significant peaks in the St. Elias Mountains, which form the most dramatically glaciated mountain system in North America.
Bona and its neighbor Mount Churchill (15,638 ft) are in fact a single massive stratovolcano, separated at 14,000 feet by a sprawling three-mile caldera plateau — the same volcanic system that produced the White River Ash eruption, one of the most powerful volcanic events in North American history, believed to have reshaped migration patterns across the continent. From the summit of Bona, the caldera plateau below is a surreal reminder that you are standing on one of the most geologically significant peaks in the United States.
The standard East Ridge route is rated Alaska Grade 2 — non-technical glacier travel and sustained high-altitude slope climbing. Like Sanford, its demands come not from technical moves but from altitude, crevasse terrain, storm exposure, and the self-rescue commitment of the Wrangell–St. Elias wilderness. A two-summit expedition — Bona plus Churchill — is a realistic goal for well-acclimatized parties and represents one of the most rewarding double-summit opportunities in North American mountaineering.
At a Glance
Mount Bona Quick Facts
| Category | Details |
|---|---|
| Elevation | 16,421 ft / 5,005 m (elevation considered uncertain; sources range 16,421–16,550 ft) |
| Location | St. Elias Mountains, Wrangell–St. Elias National Park, ~39 miles east of McCarthy, Alaska |
| Mountain Type | Active stratovolcano — Wrangell–St. Elias volcanic zone |
| USA Volcano Rank | 1st — Highest volcano in the United States |
| N. America Volcano Rank | 4th highest (behind Pico de Orizaba, Popocatép etl, Iztaccíhuatl) |
| USA Peak Rank | 4th or 5th highest independent peak (elevation uncertainty) |
| Named By | Prince Luigi Amedeo, Duke of the Abruzzi, 1897 — named for his racing yacht Bona |
| Adjacent Peak | Mount Churchill (15,638 ft) — shares the same volcanic system, separated by a 3-mile caldera plateau at 14,000 ft |
| Standard Route | East Ridge via Klutlan Glacier — Alaska Grade 2, non-technical |
| Access | Bush plane to Klutlan Glacier (~8,000–10,500 ft LZ) via Chitina / McCarthy |
| Typical Expedition Length | 10–14 days |
| First Ascent | July 2, 1930 — Allen Carpé, Terris Moore, and Andrew Taylor via the Russell Glacier |
| Administration | Wrangell–St. Elias National Park & Preserve (NPS) — no climbing permit required |
| Biggest Risks | Heavily crevassed lower glacier and icefall, high altitude, extreme storms, remote rescue, extreme cold at high camp |
Geology & History
The Highest Volcano in the USA — Geology & First Ascent
The Bona–Churchill Volcanic System
Mount Bona and Mount Churchill are not simply adjacent peaks — they are two summits of a single massive stratovolcano. At 14,000 feet, the two peaks share a broad plateau-caldera that spans approximately three miles. From the rim of this caldera, Bona’s true summit requires a further two-mile traverse across the plateau, while Churchill’s summit lies closer and can be approached via an aesthetic knife-edged southeast ridge directly from the caldera.
The volcanic system is composed of andesite and represents one of the most volcanically significant structures in North America. Bona’s uppermost section is a small stratovolcano summit sitting on a high platform of sedimentary rocks — a layered geological history visible in the rock bands exposed where the glaciers have carved away the mountain’s flanks.
The White River Ash Eruption — A Continental Event
The Bona–Churchill volcanic system is believed to be the source of the White River Ash — one of the most powerful volcanic eruptions in North American history. Occurring in two phases (approximately 1,900 and 1,200 years ago), the eruption deposited volcanic ash across enormous areas of the Yukon Territory and northwestern Canada. The ash layers are still found today across the boreal forest of the Yukon.
Geologists believe this eruption may have been powerful enough to alter weather patterns and force the migration of Indigenous peoples southward across the continent — a volcanic event potentially woven into the human story of North American population movements. Standing on the caldera plateau between Bona and Churchill, climbers are looking at the vent system that produced this continental-scale event.
Named by the Duke of the Abruzzi, 1897
Mount Bona was named in 1897 by Prince Luigi Amedeo, Duke of the Abruzzi — one of the great mountaineers of the Victorian era — while he was making the first ascent of the nearby Mount Saint Elias. From the St. Elias slopes, the Duke observed the great peak to the northwest and named it after his beloved racing yacht, Bona. The Duke of the Abruzzi would go on to make landmark first ascents in the Karakoram (K2 and the Abruzzi Spur) and in Africa (the Ruwenzori). His fleeting observation of Mount Bona and the simple naming after his boat gives this remote Alaskan peak a direct connection to the golden age of global exploration.
First Ascent: July 2, 1930
The first ascent was accomplished on July 2, 1930 by Allen Carpé, Terris Moore, and Andrew Taylor. The team approached via the Russell Glacier on the west side of the mountain — a multi-week expedition in the pre-aircraft era that required horse packing from McCarthy to reach the glacier. Terris Moore would later become the third President of the University of Alaska; Allen Carpé was one of the most accomplished North American mountaineers of his era. Their account of the first ascent, published in the American Alpine Club Journal, remains one of the finest pieces of early Alaskan mountaineering writing.
Getting There
Chitina, McCarthy & Bush Plane Access
Mount Bona is accessed exclusively by bush plane from the Chitina and McCarthy corridor — the same staging area used for Mount Blackburn, but flying further east to the Klutlan Glacier on Bona’s eastern side. There are no roads and no overland approach to the mountain. Total distance from McCarthy to the summit is approximately 39 miles in a straight line.
✈ Bush Plane & Chitina / McCarthy Access
- Landing zone: Klutlan Glacier at approximately 8,000–10,500 ft. The Klutlan is the principal glacier on Bona’s eastern side and drains east for over 40 miles into Canada’s Yukon Territory. Base camp is established at or near the LZ.
- Primary bush pilot: Ultima Thule Outfitters (Paul Claus) is the most renowned bush pilot operator serving the Bona/Churchill area. Wrangell Mountain Air also operates out of McCarthy. Most guided programs use Paul Claus’s operation.
- Staging town: McCarthy and Chitina are the primary ground staging points. McCarthy is at the end of the 60-mile unpaved McCarthy Road from Chitina. Most guided expeditions overnight at St. Elias Alpine Guides’ historic Powerhouse building in McCarthy or at the Ultima Thule Lodge.
- Drive from Anchorage: ~8 hours (Anchorage → Glenn Highway → Richardson Highway → Chitina → McCarthy Road). Budget a full day for this drive. The McCarthy Road is 60 miles of rough unpaved road requiring a high-clearance vehicle and a spare tire.
- Flight time: Approximately 30–45 minutes from McCarthy/Chitina to the Klutlan Glacier LZ. The scenic flight over the Kennicott and Nizina glaciers is spectacular.
- Weather delays: Build 2–4 buffer days for both fly-in and fly-out weather. Never book tight return flights from Anchorage.
Route Breakdown
Mount Bona Climbing Routes
The East Ridge is the overwhelmingly dominant route for all contemporary expeditions. The original 1930 route via the Russell Glacier (west side) is rarely used. A Northwest Ridge variant has been used when the standard icefall is impassable. All routes are Alaska Grade 2 — non-technical but demanding.
East Ridge via Klutlan Glacier — Standard Route
- Fly-in and base camp: Bush plane lands on the Klutlan Glacier at approximately 10,000 ft. The Klutlan is a broad, impressive glacier at the head of one of the longest ice rivers in North America — it flows 40+ miles east into the Yukon. Establish base camp at the landing zone. The enormous scale of the surrounding icefield is immediately apparent. Begin rope-team travel from here.
- Lower glacier and icefall (base camp to ~12,500 ft): The lower East Ridge approach involves ascending the Klutlan Glacier through a crevassed and icefall section. Route-finding is important here — the icefall terrain changes year to year and from season to season. Stay left of the main icefall on the western edge where better snow bridges exist. Crevasses can be enormous. A typical carry schedule moves Camp 1 to approximately 12,500 ft with one or two carry days before fully moving up.
- Upper glacier and concave bowl (12,500–14,000 ft): Above 12,500 ft the terrain opens into a glaciated concave bowl that continues to the 14,000 ft caldera plateau. This zone remains heavily crevassed and carries some avalanche risk. The 45° slopes in this section are the steepest on the route and require solid crampon technique. The top of this section brings you to the rim of the volcanic caldera — a dramatic moment as the full scale of the Bona–Churchill plateau opens before you.
- High camp in the caldera plateau (~14,000–14,500 ft): The saddle between Bona and Churchill provides excellent high camp terrain. From here, Churchill’s southeast ridge is visible and approachable. Mount Bona’s summit is approximately two miles further across the plateau to the west. This is the highest camp and the staging point for both summit attempts.
- Summit push — Bona (2+ miles from high camp): Cross the caldera plateau to the base of Bona’s summit dome. The final summit push is a long, gradual ascent on snow. The summit plateau provides extraordinary views: Mount Logan (the largest mountain mass in North America), Mount St. Elias, the Gulf of Alaska, and the entire Wrangell–St. Elias icefield system spreading in every direction.
- Optional Churchill same day or next day: Churchill’s southeast ridge is a relatively easy addition via the knife-edged ridge from the caldera saddle. Two summits in a single expedition is a realistic goal for acclimatized parties.
Northwest Ridge — Alternate Route
- Overview: The Northwest Ridge is a documented alternate route used when the direct icefall on the standard East Ridge is too broken or dangerous to navigate. From the Klutlan Glacier landing zone, the NW Ridge variant heads west rather than directly up the mountain, adding distance but avoiding the main icefall crux.
- Character: Like the East Ridge, the NW Ridge is Alaska Grade 2 — non-technical sustained glacier travel and snow climbing. The route still arrives at the high caldera plateau and shares the upper mountain and summit push.
- When to use it: Guide services will assess the icefall condition after landing and may choose this variant if the direct line is impassable. In 2014, an IMG expedition used the NW Ridge after finding the direct icefall blocked by precariously leaning seracs. Always defer to your guide or experienced local operator on route choice after landing and assessing actual conditions.
Russell Glacier Route — Historic First Ascent (1930)
- Historical significance: The Russell Glacier approach was used by Allen Carpé, Terris Moore, and Andrew Taylor for the first ascent in 1930. In the pre-bush-plane era, the team used pack horses and horse sleds from McCarthy to reach the glacier — a weeks-long overland approach.
- Modern use: The Russell Glacier route is rarely used today. The Klutlan Glacier (east side) provides easier bush plane access and a more straightforward route to the caldera plateau. Most guide services and independent parties use the East Ridge exclusively.
- For researchers: Allen Carpé’s original 1930 route description was published in the American Alpine Club Journal and remains one of the finest accounts of early Alaskan mountaineering. Carpé later died in a crevasse fall while attempting the first ascent of Denali’s Muldrow Glacier in 1932.
Double Summit
Mount Churchill — The Bonus Summit
🏠 Mount Churchill (15,638 ft / 4,766 m) First Climbed 1951
Mount Churchill is the second highest summit of the Bona–Churchill volcanic system and one of Alaska’s most distinctive peaks. Its southeast ridge — a beautiful knife-edged snow arête rising from the shared caldera plateau — is one of the most aesthetic summit routes in the St. Elias Range. Most Bona expeditions are staged with the Churchill bonus in mind.
- How to reach it: From high camp in the caldera saddle at ~14,000–14,500 ft, Churchill’s southeast ridge is the most direct approach. The ridge is knife-edged but moderate — solid crampon technique required. The summit can often be reached the day before or after the Bona summit push.
- First ascent: 1951 by R. Gates and J. Lindberg — 21 years after the first ascent of Bona, reflecting how remote and difficult to access this peak is even relative to its neighbor.
- The White River Ash connection: Churchill’s crater is believed to be one of the primary vents of the White River Ash eruption system. Standing on Churchill’s summit means standing on top of one of the most consequential volcanoes in North American history.
- Views from Churchill: The caldera plateau stretching toward Bona is a stunning panorama. The massive Klutlan Glacier drainage heading east into Canada, and the entire St. Elias Range extending to the horizon, make this one of the most remarkable summit view platforms in Alaska.
- Recommendation: If weather and team energy allow, attempt Churchill either the day before or the day after Bona. The two-summit experience on a single expedition is rare and exceptional in North American mountaineering terms.
Sample Itinerary
Typical 12-Day Expedition Timeline
The following reflects a combined Bona + optional Churchill expedition. Weather delays are built in at every stage. All days are approximate and will be adjusted by guides based on conditions.
Day 1 — Anchorage
Day 2 — Anchorage to McCarthy
Day 3 — Fly onto the Klutlan Glacier
Days 4–6 — Lower Glacier and Icefall to Camp 1
Days 7–8 — Camp 1 to High Camp in the Caldera
Day 9 — Summit Mount Churchill (Optional Day 1 of Double Summit)
Day 10 — Summit Mount Bona
Days 11–12 — Descent and Fly-out
Regulations & Fees
Permits & Park Regulations
No Climbing Permit Required
Like all peaks in Wrangell–St. Elias National Park, Mount Bona requires no climbing permit and no permit fee. The park imposes no quotas, no registration fees, and no mandatory check-ins. You may climb freely.
Trip Itinerary — Essential Safety Measure
- All parties are strongly encouraged to file a trip itinerary with the park before departure. The park notes explicitly: “Keep in mind this park has no search and rescue service. If you don’t return, no one will come looking for you.” The voluntary itinerary is the primary mechanism for alerting someone if your party fails to return.
- File with park headquarters: (907) 822-5234. Include party size, route, expected return date, and emergency contact.
Kluane National Park (Canada)
- The Klutlan Glacier drains east into Canada’s Yukon Territory. If any part of your expedition crosses the international boundary, Kluane National Park (Canada) requires a separate permit in advance. Contact Kluane: (867) 634-7250.
- Most Bona expeditions remain entirely on the Alaskan side and do not require Kluane permits. Confirm your route with your guide service before departure.
| Resource | What It Covers | Contact / Link |
|---|---|---|
| Wrangell–St. Elias NP (NPS) | Park regulations, trip itinerary filing, climbing conditions | nps.gov/wrst → · (907) 822-5234 |
| Ultima Thule Outfitters (Paul Claus) | Primary bush pilot for Bona / Klutlan Glacier fly-in; Ultima Thule Lodge staging | ultimathulelodge.com → |
| Wrangell Mountain Air | Scheduled McCarthy flights + charter bush planes | wrangellmountainair.com → |
| Kluane National Park (Canada) | Required if route crosses into Yukon, Canada | Phone: (867) 634-7250 |
Seasonal Planning
Best Time to Climb Mount Bona
The St. Elias Mountains receive severe weather from the Gulf of Alaska. Bona’s more interior position compared to the coastal St. Elias peaks gives it a slightly more continental climate than Mount St. Elias or Mount Fairweather — but severe storms are still frequent and can last multiple days. The spring and early summer window offers the best balance of consolidated snow, manageable temperatures, and fly-in conditions.
| Season | Window | Pros | Watch-outs |
|---|---|---|---|
| Spring ★ Primary | May – early June | Best snow consolidation; crevasses well-bridged; colder temps keep snow firm; excellent ski terrain on lower glacier | Cold high camp temperatures (well below −20°F possible); storm cycles frequent; daylight increasing but still limited early May; bush pilot availability may be constrained early season |
| Early Summer ★ Primary | June – early July | Nearly 24 hours of daylight; most weather windows; guided programs typically run this window; moderate base camp temperatures; best for double Bona + Churchill attempt | Snow softening on lower glacier by late June; crevasses beginning to open; peak season for the handful of parties attempting the peak; weather still highly variable |
| Late Summer | July – August | Best weather statistics; warm lower glacier; long light | Crevasses significantly more open; lower glacier more complex to navigate; fewer guide services operating; bush pilot availability variable |
| Off Season | Sept – April | Winter ski mountaineering for rare expert expeditions only | Extreme cold; limited daylight; severe storms; McCarthy Road may be difficult; no standard guide programs; not appropriate for recreational expeditions |
Equipment
Essential Gear for Mount Bona
Bona requires the same full Alaskan high-altitude expedition kit as Sanford. Being Alaska Grade 2 (non-technical), the emphasis is on glacier travel, extreme cold management, crevasse rescue, and the logistics of a 10–14 day remote glacier camp. Skis are an excellent addition — the lower glacier and caldera plateau offer outstanding ski terrain.
⛰ High-Altitude Cold Weather
- Expedition down suit (rated −30°F or colder)
- Sleeping bag (−30°F rated minimum)
- Insulating mid-layers ×2–3
- Heavyweight base layers ×2–3 sets
- Expedition overmitts + liner gloves
- Balaclava + face protection
- Expedition boots (crampon-compatible, cold-rated)
- Glacier goggles (high UV, double-lens)
🠗 Glacier & Technical
- 12-point crampons (step-in preferred)
- Ice axe (mountaineering, 60–70 cm)
- Climbing harness + helmet
- Dynamic rope 50–60 m per team
- Prussik cords ×3 + pulley (crevasse rescue)
- Ice screws ×2–3 per team
- Snow pickets ×2–4 (tent anchors)
- Sleds for lower glacier carries
- Skis + skins (optional; highly recommended)
⛺ Shelter & Camp
- 4-season expedition tent (rated 60+ mph wind)
- Insulated sleeping pads ×2
- Liquid-fuel stove (canister gas fails in cold)
- Fuel: 1.5 liters per person per day minimum
- Snow saw + probe (build wind protection at exposed camps)
- 10–14 days of food + 3 buffer days
- Wag bags for all glacier camps (mandatory pack-out)
📡 Communications & Safety
- Satellite phone — essential (no cell coverage)
- PLB or EPIRB emergency beacon
- GPS device with Bona/Churchill route loaded
- USGS topo + compass
- Headlamp ×2 + lithium batteries (cold-resistant)
- Sunscreen SPF 50+ + lip balm (glacier UV)
- Comprehensive first-aid + frostbite treatment kit
Risk & Preparedness
Difficulty & Safety Notes
What kind of climb is Mount Bona?
Like Mount Sanford, Bona is rated Alaska Grade 2 — non-technical, but serious. The grade reflects remoteness, altitude, crevasse terrain, cold, and storm frequency rather than technical climbing moves. Bona sits at 16,421 ft — genuine high altitude where altitude sickness, HAPE, and HACE are real risks. The key distinction from lower-48 glacier peaks is the Alaska expedition context: no ranger infrastructure, no rescue guarantee, extreme cold, and a remote bush plane relationship that weather can disrupt without warning.
Primary hazards
- Crevasse fields (lower glacier and icefall): The lower Klutlan Glacier and the icefall zone are heavily crevassed. Crevasse falls have occurred in this section. Rope travel is mandatory from base camp. Pre-departure crevasse rescue practice is essential — not optional.
- Steep concave bowl (12,500–14,000 ft): The 45° maximum slopes in this zone carry some avalanche risk and require solid crampon technique. Move early when snow is firm and monitor conditions before ascending.
- High altitude: The summit at 16,421 ft is above the threshold for serious altitude illness. The acclimatization program of carries and sleeping lower is the primary management strategy. Know the signs of AMS, HAPE, and HACE and have a clear descent protocol if any team member shows concerning symptoms.
- Gulf of Alaska storms: Even with a more continental position than the coastal St. Elias peaks, Bona receives severe storms that can arrive quickly and pin parties for 2–4 days. Adequate shelter, fuel, and food reserves are a safety requirement, not a comfort preference.
- Remote rescue: The park has no search and rescue service. Self-rescue capability and a satellite phone for bush pilot coordination are the only reliable safety mechanisms. Rescue can take days even in favorable weather.
Guided Expeditions
Mount Bona Guide Services
Guided programs handle all bush pilot coordination, route selection, crevasse rescue instruction, acclimatization management, and weather decision-making. For a first Alaskan high-altitude expedition, a guided program on Bona is strongly recommended.
SEAG is the primary guided operator for Mount Bona expeditions and is based in McCarthy — the staging hub for the Klutlan approach. Their Bona program is described as an ideal step up from Sanford for climbers building toward higher objectives. They coordinate directly with Paul Claus and Ultima Thule for bush pilot access and have the deepest route knowledge on the mountain.
Visit Website →IMG has run guided Bona expeditions as part of their Alaskan high-altitude program. Their structured approach includes thorough pre-trip gear review, crevasse rescue training, and route-finding flexibility based on current conditions — demonstrated in their use of the NW Ridge alternate when the standard icefall was impassable.
Visit Website →San Juan Mountain Guides offers a Mount Bona expedition specifically designed as preparation for Denali — covering glacier travel, crevasse rescue, snow camping, and high-altitude skills in the exact environment those objectives demand. Their program uses Paul Claus and Ultima Thule for bush plane access.
Visit Website →Common Questions
Frequently Asked Questions About Mount Bona
Live Conditions
Map of Mount Bona & Live Weather
Summit location and live weather from Bona’s coordinates (61.385°N, 141.750°W). The map shows the summit, Mount Churchill adjacent to the east, and the McCarthy staging hub to the west. Bush planes fly approximately 30–45 minutes southeast from McCarthy to the Klutlan Glacier landing zone on Bona’s eastern flank.
Mount Bona — Summit Conditions
16,421 ft / 5,005 m · Highest volcano in the USA · Live from summit coordinates
How to Use This Map
Blue pin = Mount Bona summit (16,421 ft). Green pins = McCarthy staging hub and Mount Churchill (15,638 ft). The shared volcanic caldera plateau connecting Bona and Churchill at ~14,000 ft is the high camp zone — approximately 2 miles southeast of Bona’s summit. The Klutlan Glacier landing zone is on the eastern (right) side of the Bona massif. All access is by bush plane from McCarthy.
Planning Summary
At-a-Glance Planning Snapshot
| Mountain | Mount Bona |
| Elevation | 16,421 ft / 5,005 m (elevation considered uncertain) |
| Location | St. Elias Mountains, Wrangell–St. Elias NP, Alaska |
| Distinction | Highest volcano in the United States |
| Volcanic System | Same stratovolcano as Mt. Churchill; caldera plateau at 14,000 ft connects both summits |
| Access | Bush plane to Klutlan Glacier (~10,000 ft) via McCarthy / Chitina |
| Standard Route | East Ridge via Klutlan Glacier (Alaska Grade 2 — non-technical) |
| Bonus Summit | Mount Churchill (15,638 ft) — reachable via SE ridge from caldera high camp |
| Expedition Length | 10–14 days; plan 3+ buffer days for weather |
| Best Season | May – early July (spring and early summer) |
| Required Skills | Glacier travel, crevasse rescue, crampon / ice axe, high-altitude cold-weather camping |
| Climbing Permit | None required — no NPS fee for Wrangell–St. Elias peaks |
| Kluane Permit | Required only if route crosses into Yukon, Canada (most parties stay in Alaska) |
| Trip Itinerary | Strongly recommended — no park SAR service; file with NPS (907) 822-5234 |
| Primary Hazards | Crevasses and icefall, high altitude, severe storms, extreme cold, remote rescue |