Last updated September 22, 2026
Continental Divide Trail: Complete CDT Thru-Hike Guide
The Continental Divide Trail follows the backbone of the Rocky Mountains for roughly 3,100 miles from the Mexican border to Canada. It is the highest, most remote and most route-flexible member of America’s Triple Crown—crossing desert, 14,000-foot alpine terrain, the Great Divide Basin, Yellowstone and Glacier while forcing hikers to solve snow, water, navigation, permits and route choices for five to seven months.
How Long Is the Continental Divide Trail?
The Continental Divide Trail Coalition describes the CDT as a roughly 3,100-mile National Scenic Trail running between Mexico and Canada through New Mexico, Colorado, Wyoming, Idaho and Montana. A thru-hike commonly takes five to seven months. The route reaches 14,278-foot Grays Peak in Colorado—the highest point on the CDT and on any U.S. National Scenic Trail. Unlike the AT or PCT, the CDT is still not completely built, and route alternates are a major part of how many thru-hikers actually experience the Divide.
The southernmost 1.1 miles of the CDT, including the Crazy Cook monument, are now inside the New Mexico National Defense Area. Access requires permission from the U.S. Army at Fort Huachuca. A free NDA access pass is available to qualified applicants, and CDTC’s normal shuttle access has been modified around the restricted area.
The CDT From the Chihuahuan Desert to Glacier.
The trail follows the Continental Divide through radically different landscapes. A northbound hiker can move from desert water carries into lingering Colorado snow, then through Wyoming basin country, Yellowstone, Montana wilderness and finally Glacier National Park.
What Is the Continental Divide Trail Actually Like?
The CDT is best understood state by state. The environmental problem in New Mexico has little in common with Colorado snow or northern Montana grizzly country.
Desert + Gila
Long water carries, exposed terrain, cattle-country sources and remote road walking define the south. Many hikers also choose the famous Gila River Alternate.
High Rockies
Colorado is the altitude centerpiece: San Juans, Collegiate country and Grays Peak. Snowpack and lightning can control entire days.
Basin to Winds
The route moves from exposed Great Divide Basin terrain into the Wind River Range and then Yellowstone National Park.
Remote Divide
Long ridgelines, sparse access, forest, ranch country and major alternates characterize much of the central northern route.
The Final Wilderness
The Bob Marshall complex and Glacier National Park create a spectacular but permit-sensitive finish at the Canadian border.
The CDT Begins With Water Decisions, Not Mountain Passes.
Southern New Mexico can require careful water planning long before hikers reach Colorado’s snow. Natural sources, tanks, wells and caches vary in reliability, and long carries are part of the route. The Gila River Alternate changes that experience completely by moving hikers into a river canyon where repeated crossings replace the driest official-route miles.
Why the CDT Is Different From the AT and PCT.
The CDT has a marked official route, but it still asks hikers to make substantially more route, navigation and timing decisions than the other two Triple Crown trails.
Alternates Matter
Gila River, Cirque of the Towers, Knapsack Col, Anaconda and other alternates are not obscure curiosities. Many are used by large portions of the thru-hiking community.
The Trail Is Not Always Obvious
The official CDT is mapped, but intersections, road walks, open country, snow and alternate junctions make active navigation more important than simply following blazes.
The Trail Is Still Being Built
CDTC’s latest reporting identifies remaining gaps where the route still uses roads, private-land crossings or unfinished trail segments.
Higher Than the Other Two
Grays Peak puts the official CDT above 14,000 feet. Long portions of Colorado remain at elevations where snow and electrical storms matter.
Less Crowded
Hundreds rather than thousands attempt a CDT thru-hike in a typical year, creating a more dispersed trail community.
Usually Not Trail Number One
In the independent 2025 survey, only 5.2% of respondents said the CDT was their first long-distance hike. The typical respondent arrived with substantial backpacking experience.
Should You Hike the CDT Northbound or Southbound?
Direction determines whether you spend spring trying to reach Colorado after the snowpack begins to settle or summer waiting for Glacier and the northern Rockies to become passable.
Desert First
Northbound hikers commonly begin in April. They must manage New Mexico heat and water while timing their arrival into the San Juans around Colorado snow conditions.
Glacier First
Southbound hikers commonly begin in late June as Glacier access improves. They then race south through the Rockies before late-season Colorado and New Mexico weather becomes limiting.
Escape a Bad Window
Some hikers reposition when snow, wildfire or other conditions close the viable corridor. In the 2025 survey, snow was the most common reason respondents reported flip-flopping.
The CDT has two moving gates.
A northbound hiker cannot control Colorado snowmelt. A southbound hiker cannot control the opening of Glacier’s high country. Successful timing means arriving when the mountain system allows travel—not when the original spreadsheet says you should arrive.
Official CDT Route vs Alternate Routes.
Few characteristics define CDT culture more strongly than alternates. They may avoid weather, reach water, shorten road walking, pass through a spectacular landscape or simply create a different version of the journey.
| Alternate | Region | 2025 survey use | Why hikers consider it |
|---|---|---|---|
| Gila River Alternate | New Mexico | 95.7% | River canyon travel and one of the defining landscapes of the southern CDT. |
| Ghost Ranch Alternate | New Mexico | 82.6% | Scenery, access and resupply considerations around northern New Mexico. |
| Cirque of the Towers | Wyoming | 77.8% | Moves through one of the Wind River Range’s signature granite landscapes. |
| Knapsack Col | Wyoming | 59.3% | A more alpine Wind River experience requiring stronger route and terrain judgment. |
| Anaconda Cutoff | Montana | 51.8% | Changes mileage and town logistics through southwest Montana. |
| Chief Mountain Route | Northern Montana | 46.4% | A lower-elevation northern terminus option that can be useful early or late in the season. |
Percentages come from the independent 2025 Halfway Anywhere CDT survey of 144 respondents. They describe that survey group, not every CDT hiker. Routes, closures and land-access rules can change; an alternate’s popularity is not proof that it is currently open or suitable.
The CDT Is the Only Triple Crown Trail That Climbs a Fourteener.
The official route reaches the summit of Grays Peak at 14,278 feet. That single statistic captures the character of Colorado: long alpine exposure, lingering snow, fast electrical storms and sustained high elevation rather than one isolated high pass.
Photo: Xnatedawgx · Wikimedia Commons · CC BY-SA 4.0Which Permits Does a CDT Thru-Hiker Need?
Unlike the PCT, there is no one long-distance permit covering the CDT. CDTC says full-length hikers should plan for at least three major permit systems, plus any additional local requirements created by their exact route.
Wilderness Camping Permit
Overnight camping in Glacier requires a wilderness permit and assigned backcountry sites.
- Approximately 70% of sites are allocated to advance reservations.
- About 30% are held for walk-up availability.
- 2026 fee: $10 permit fee + $7 per person per night.
- Advanced itineraries are limited to 16 miles between campsites.
Backcountry Permit
Overnight travel through Yellowstone requires camping in designated backcountry sites under a park permit.
- 2026 recreation fee: $5 per person per night.
- There is also a $10 reservation fee.
- Reservations must be converted into the actual permit under current park procedures.
Recreation Permit
A Conservation/Recreation Use Permit is required when the route uses Blackfeet Reservation lands near Glacier and East Glacier.
- Carry proof of a valid permit.
- Fishing requires a separate permit.
- Rules are independent of the Glacier wilderness permit.
Trail registration is not a permit.
CDTC offers voluntary thru-hiker registration and trail alerts, but explicitly notes that registration does not replace any legally required permit.
Crazy Cook and the New Mexico National Defense Area.
The traditional southern terminus is the Crazy Cook monument on the U.S.–Mexico border south of Lordsburg.
That access changed after the creation of the New Mexico National Defense Area in 2025.
- The southernmost 1.1 miles of CDT are within the restricted area.
- The Crazy Cook monument itself lies inside the NDA.
- A free U.S. Army access pass is required to enter that section.
- Non-U.S. citizens may be issued a temporary visitor pass requiring an escort.
- CDTC can operate its shuttle to Mengus Well, roughly two miles from the border, outside the NDA.
CDTC states that choosing not to enter the NDA does not prevent recognition of a completed CDT journey.
Continental Divide Trail · Bureau of Land Management.Colorado: Snow, Lightning and 14,278-Foot Grays Peak.
Colorado is the section most likely to transform the CDT from long-distance backpacking into sustained high-alpine travel. The question is not simply whether a hiker is fit enough to climb—it is whether snowpack and daily weather make the route reasonable.
San Juan Timing
Northbound hikers may reach southern Colorado while major snow remains. Steep traverses, avalanche conditions and difficult navigation can force waiting, rerouting or flipping.
Lightning
Long stretches stay above treeline. Early starts and conservative decisions matter because electrical storms can develop before the hiking day is finished.
Grays Peak
The official CDT crosses 14,278-foot Grays Peak, making it the highest point on any National Scenic Trail in the United States.
Wyoming Contains Both the Emptiest and Most Alpine CDT Landscapes.
The Great Divide Basin is exposed and water-limited. The Wind River Range is granite, lakes and high mountains. Yellowstone adds permits and designated campsites. Few states change character as completely from one CDT section to the next.
Wind River Range · Wikimedia CommonsNavigation and Water Planning Are Core Skills.
The CDT’s modern map data is strong—CDTC released its fourth-edition map sets for 2026—but a mapped trail does not remove the need to understand where you are and how conditions change the route.
Carry More Than One Layer
Use current offline digital mapping plus a second way to understand your route. Snow, junctions, road walks and alternate decisions can make passive app-following unreliable.
Check Current Reports
New Mexico and the Great Divide Basin can involve long carries and marginal sources. A water waypoint on a map is not a promise that usable water is present today.
Expect No Service
CDTC specifically notes that portions of the CDT and common alternates are remote enough that cell coverage cannot be treated as an emergency communications plan.
Not All of the Continental Divide Drains to an Ocean.
In Wyoming’s Great Divide Basin, the Continental Divide splits around an interior-drainage basin. For thru-hikers, the geography translates into exposed walking, long sight lines and careful water management—an enormous contrast with the Wind River Range nearby.
Oregon Buttes near South Pass · Ericshawwhite · CC BY-SA 3.0How Often Do CDT Hikers Resupply?
The CDT has longer and more complicated town access than many AT sections, but a full hike does not require carrying weeks of food at a time.
Average number of resupplies among completing respondents.
Typical reported time between resupply stops.
Reported average mileage between resupplies.
Average total mailed boxes among completing respondents.
Figures are from the independent 2025 Halfway Anywhere CDT survey. The sample was voluntary and does not represent every CDT hiker. Actual resupply choices depend heavily on alternates, dietary needs, hitching and current business availability.
Do not pre-box the entire CDT.
The route changes too much. Pace changes. Alternates change. Wildfire changes. A flexible strategy lets hikers mail boxes forward from the trail when a specific remote stop actually requires one.
How Long and How Much Does a CDT Thru-Hike Take?
CDTC uses a broad five-to-seven-month planning window. Recent hiker survey data shows what a faster modern thru-hiking cohort actually reported.
Average total duration among completing thru-hiker respondents.
Mileage averaged across the full trip including zero days.
Reported average spent during a completed thru-hike.
Average reported gear spending before departure.
The 2025 survey had 144 respondents and is self-selecting. Its completion rate should not be interpreted as the probability that a randomly selected CDT starter will finish. Use the cost and pace figures as contemporary planning benchmarks, not guarantees.
Grizzly Country Changes Camp Behavior.
As the CDT moves north through Wyoming and Montana, hikers enter increasingly significant grizzly-bear habitat.
A thru-hiker should treat bear safety as a system rather than a single piece of equipment:
- Follow each land manager’s current food-storage requirements.
- Keep food and other scented items secure.
- Carry bear spray where appropriate and know how to deploy it.
- Avoid surprising bears in dense vegetation or noisy water.
- Do not use social-media sightings as a substitute for current ranger information.
Glacier, Yellowstone and surrounding national forests can impose different requirements, so check each jurisdiction before entering it.
Many Glacier · Glacier National Park · Montana.Waterton or Chief Mountain?
The CDT has two designated northern termini near Glacier National Park and Canada. The appropriate finish depends on season, snow, permits and international-border logistics.
The Classic Finish
The Waterton route reaches the international boundary and continues by the Lakeshore Trail toward Waterton Townsite in Canada. Border-entry procedures must be followed.
Lower-Elevation Option
Chief Mountain stays lower and can be attractive when high-country snow complicates the Waterton route. The border port is seasonal.
The Campsites Control Mileage
Designated-campsite itineraries can force thru-hikers into days shorter or longer than their normal trail pace. Flexibility is essential when seeking walk-up permits.
Do not improvise an international crossing.
Northbound hikers entering Canada through the Waterton route must follow current Canadian border procedures. Southbound hikers entering the United States from Waterton must follow current U.S. Customs and Border Protection procedures, including the applicable ROAM process. Verify requirements immediately before travel.
The CDT Does Not Get Simpler Near the Finish.
A northbound thru-hiker enters some of the most dramatic mountain terrain of the entire trail just as the seasonal clock is running out. Glacier combines designated campsites, permit constraints, grizzly country, border procedures and the possibility of early autumn storms.
Glacier National Park · NPS · public domainWhat Gear Does a CDT Thru-Hiker Need?
No single packing list solves New Mexico desert, Colorado snow and northern Montana cold at the same time. The better approach is a modular system.
Offline Maps + Backup
The CDT rewards hikers who understand their route rather than merely follow a phone screen.
Variable Capacity
Carry enough capacity for dry New Mexico and Wyoming stretches while avoiding unnecessary weight when reliable water returns.
Condition-Specific Tools
Traction, ice axe and snow equipment should be added or removed based on actual conditions and real skill—not a calendar date alone.
Cold Above Treeline
The CDT stays high. A summer day can still create hail, sleet, freezing temperatures or intense wind.
Satellite Capability
A satellite messenger provides a more realistic communication layer than depending on intermittent cellular coverage.
Bear Country System
Food-storage regulations change by jurisdiction. Build the northern gear plan around current requirements.
Best CDT Sections Without a Five-Month Commitment.
Section hiking is especially useful on the CDT because the trail contains several landscapes strong enough to justify a trip by themselves.
Gila Country
A river-and-canyon version of the CDT that feels completely different from the dry bootheel farther south.
San Juans
High-elevation Rockies, long ridges and some of the most consistently alpine terrain on any American long trail.
Wind River Range
Granite mountains, lakes and famous alternate options such as Cirque of the Towers create a world-class standalone backpacking objective.
Yellowstone
The CDT crosses the national park and connects long-distance hiking with Yellowstone’s backcountry permit system.
Bob Marshall Wilderness
Large wilderness, long carries and remote mountain travel provide a concentrated version of the northern CDT experience.
Glacier National Park
A spectacular northern section where campsite permits and border logistics need to be solved before the scenery can be enjoyed.
A Practical CDT Planning Sequence.
Route choice is too important on the CDT to leave until after gear purchases and transportation reservations.
Choose Direction
NOBO, SOBO or flip-flop determines which end of the snow calendar you solve first.
Build Route Philosophy
Decide how strongly you want to prioritize the official line versus major alternates.
Download Current Maps
Use the current CDTC map set and closure information—not an old trail file.
Solve Terminus Access
The southern NDA and northern international border both require more planning than a normal trailhead.
Identify Permits
Glacier, Yellowstone, Blackfeet lands and local wilderness requirements need separate attention.
Build Water Strategy
Review current water information for New Mexico and basin sections before departure.
Budget for Change
Alternates, fire, snow, hotels and transportation can create costs the original itinerary never predicted.
Replan Constantly
Conditions determine the real trail. The best pre-hike plan is one that is easy to change.
Leave Margin
Build enough calendar flexibility to wait, reroute or flip without turning every weather event into an emergency.
Finish Legally
Border requirements matter at both ends. A monument photo never outweighs federal access rules.
The Three Great American Thru-Hikes Are Now Connected.
The CDT completes the flagship Triple Crown child set. Use the parent hub when the decision is which trail to hike; use these child pages when the decision is how to hike a particular trail.
Plan the Shared Problems in More Depth.
The CDT page owns the route. These supporting pages own the planning systems that apply across multiple long-distance trails.
Three More Guides for Mountain Judgment.
The CDT spends enough time at altitude, in remote terrain and in fast-changing weather that mountain skills matter as much as ordinary backpacking systems.
Use Current Sources Before Entering the Divide.
The CDT remains an evolving route. Current maps, closures, access restrictions and local land-management rules should outrank old guidebooks and downloaded itineraries.
Continental Divide Trail FAQ.
The questions that matter most before committing to the most remote member of the Triple Crown.
How long is the Continental Divide Trail?
The Continental Divide Trail Coalition describes the CDT as approximately 3,100 miles long from the U.S.–Mexico border in New Mexico to the U.S.–Canada border in Montana. Exact thru-hike mileage varies because of reroutes and alternate-route choices.
Which states does the Continental Divide Trail cross?
The CDT crosses five states: New Mexico, Colorado, Wyoming, Idaho and Montana.
How long does a CDT thru-hike take?
CDTC gives a broad planning range of approximately five to seven months. In the independent 2025 Halfway Anywhere survey, completing thru-hiker respondents averaged 145 total days.
What is the highest point on the Continental Divide Trail?
Grays Peak in Colorado is the highest point on the CDT at 14,278 feet. CDTC also identifies it as the highest point on any U.S. National Scenic Trail.
Is the Continental Divide Trail finished?
Not completely. CDTC reported 14 remaining gaps in its 2025 annual report and continues working with agencies, communities and landowners to replace remaining road and incomplete sections with a protected trail corridor.
Does the CDT have one official route?
Yes, there is an official Continental Divide National Scenic Trail alignment, and CDTC publishes current maps for it. However, the CDT also has a strong alternate-route culture, and many thru-hikers use established alternates such as the Gila River, Cirque of the Towers or Anaconda routes.
Do you need a permit to thru-hike the CDT?
There is no single trail-wide CDT permit. Full thru-hikers need to obtain applicable permits for individual jurisdictions. CDTC identifies Glacier National Park, Yellowstone National Park and Blackfeet Reservation recreation access among the important systems to plan for.
Can hikers still reach the Crazy Cook southern terminus?
Yes, but access changed after the southernmost 1.1 miles of the CDT became part of the New Mexico National Defense Area. Anyone entering that restricted area needs permission from the U.S. Army at Fort Huachuca under the current access process.
Where does the CDT end in the north?
The CDT has two designated northern termini near the Canadian border: the Waterton route and the Chief Mountain route. Which one is appropriate can depend on season, snow, backcountry permits and border logistics.
Can CDT hikers cross into Canada?
International crossing is possible only when current customs requirements and the applicable border-crossing procedures are followed. CDTC publishes current instructions for Waterton and Chief Mountain, and hikers should verify them immediately before their trip.
How much does a CDT thru-hike cost?
There is no fixed official budget. In the 2025 Halfway Anywhere survey, completing thru-hiker respondents reported spending an average of $9,743 during the hike, with average pre-hike gear spending of $1,241 tracked separately.
How often do CDT hikers resupply?
In the 2025 survey, completing thru-hikers averaged 31 resupplies, approximately five days and 101 miles between resupply stops.
Is the CDT harder than the PCT or Appalachian Trail?
The CDT generally asks for more independent route finding, more alternate-route decisions and longer stretches of remote travel. The AT concentrates difficulty in repetitive steep terrain, while the PCT creates major desert, snow and seasonal-window problems. Which feels harder depends on the hiker’s experience and conditions.
Should the CDT be your first thru-hike?
It can be, but most current CDT hikers arrive with previous long-distance backpacking experience. Only 5.2% of respondents in the 2025 Halfway Anywhere survey reported that the CDT was their first long-distance hike.
There Is a Route—but the Journey Requires Decisions.
The Continental Divide Trail is not simply a longer PCT or a western Appalachian Trail. Snow can change the line. Water can change the day. A permit can change the itinerary. An alternate can change the distance. Fire can erase the plan entirely. The strongest CDT hikers arrive with a system for making good decisions when the trail they planned is no longer the trail in front of them.
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Global Summit Guide is an independent mountaineering resource founded in 2026. The team combines first-hand trekking and climbing experience with in-depth research and professional health and nutrition review to help climbers choose objectives, prepare properly, and stay safe.
Health, altitude, and nutrition content is reviewed by Taylor Ludlow (Registered Nurse) and Brigg Hoopes (Nutritionist).
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