At a Glance
Route Comparison
The Keyhole Route is the right choice for the overwhelming majority of Longs Peak summit parties. The Loft and technical routes suit climbers with specific skills or objectives beyond the standard summit experience.
| Route | Class | Distance RT | Gain | Character | Key Challenge |
|---|---|---|---|---|---|
| Keyhole Route | Class 3 | ~15 mi | ~5,100 ft | Hike to Keyhole, then 5 technical sections to summit | Length, altitude, lightning timing, polished rock on Homestretch |
| Loft Route | Class 3–4 | ~15 mi | ~5,100 ft | Approaches summit from the south via the Loft saddle; more complex route-finding | Loose terrain, less-defined path, more demanding navigation |
| North Face / Cables Route | Class 4–5.easy | Varies | Varies | More direct but steeper and more exposed lines on the North Face | Technical exposure; requires confident scrambling or climbing |
| The Diamond (East Face) | 5.10+ / Grade IV–V | Multi-day approach | High | World-class big wall alpine rock climbing on Longs’ famous east face | Full alpine rock competence; serious commitment; permit required |
Keyhole Route — Step by Step
The Keyhole Route is marked throughout with red and yellow bull’s-eye cairns — follow them carefully, especially in the upper sections where route-finding mistakes are common. The route is divided into five distinct character zones above the Keyhole notch.
- 1
Longs Peak Trailhead to the Keyhole (~6 mi, ~2,600 ft gain)
A long but straightforward hike on a well-defined trail from the trailhead (9,405 ft) through alpine meadows and Granite Pass to Boulderfield (~12,760 ft). At Boulderfield, trail transitions to boulder-hopping. The Agnes Vaille Shelter at the Keyhole (13,150 ft) marks the transition into technical terrain. Start no later than 2–3 AM to safely summit and descend before afternoon lightning.
- 2
The Ledges (13,150–13,500 ft)
After passing through the Keyhole notch, the route traverses a series of exposed ledges on the west face of Longs Peak. The exposure is immediate and significant — a substantial drop falls away on the left. The ledges themselves are mostly wide enough for confident movement, but wet or icy conditions make them genuinely hazardous. Follow the bull’s-eye markers carefully.
- 3
The Trough (13,500–14,000 ft)
A steep couloir of loose rock and scree climbing roughly 500 vertical feet to the upper mountain. The Trough is the most physically demanding section — exhausting at altitude and subject to rockfall from parties above. Stay to the right side of the couloir to minimize rockfall exposure. Helmets are recommended specifically for the Trough.
- 4
The Narrows (14,000 ft)
A traversing ledge system at approximately 14,000 ft with significant vertical exposure on both sides. The ledge is wide enough in most places to walk carefully, but a slip would be serious. The Narrows require focused movement and good footwork — this is where many parties feel the altitude most acutely in combination with the exposure.
- 5
The Homestretch (14,000–14,259 ft)
The final push to the summit — a steep slab of polished granite at roughly 45 degrees. Positive hand and foot holds exist throughout, but the granite is extremely smooth and slick when wet. Many parties find the descent of the Homestretch more unnerving than the ascent. Use all four limbs; move deliberately. In early season snow or after rain, this section becomes a much more serious proposition.
The Keyhole Route is described at Class 3 in dry summer conditions. On a wet, icy, or snow-covered Homestretch, the same terrain becomes Class 4 or harder and has been the site of serious falls and fatalities. If the Homestretch is wet when you arrive, assess carefully before committing. Many experienced parties turn back at the base of the Homestretch in adverse conditions — this is the right call.
Loft Route & Technical Lines
The Loft Route
The Loft Route approaches Longs Peak from the south, ascending to the Loft — a broad saddle between Longs and Mt. Meeker (~13,500 ft) — before climbing the south face to the summit. It’s a more complex route with less-defined trails, looser terrain, and more demanding navigation than the Keyhole. Often used by experienced parties seeking a less-crowded line or a traverse. Not recommended as a first ascent of Longs Peak.
The Diamond — East Face
The Diamond is one of the most celebrated alpine rock walls in the United States — a 900-foot vertical granite face on the east side of Longs Peak at over 13,000 ft. Technical routes on the Diamond range from 5.10 to 5.12+ and require a National Park Service permit, multi-day commitment, advanced alpine rock skills, and sound route-finding on a remote face. It is a world-class objective and a completely different undertaking from the Keyhole Route.
Peak Comparison Tool
Compare Longs Peak against other major Colorado 14ers and US alpine objectives to see where it fits in difficulty and commitment level relative to your climbing background.
Open Tool →Fitness Assessment Checklist
Assess your aerobic fitness and scrambling skills against the Keyhole Route’s real demands — 15 miles, 5,100 ft of gain, and Class 3 terrain above 13,000 ft.
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