The Keyhole Route is the standard and best-known alpine route on Longs Peak, and it is the only route most climbers use to reach the summit. It is a long, strenuous mountaineering route rather than a hike, with sustained scrambling and exposed sections above treeline. The route crosses the famous Keyhole, then traverses the Trough, Narrows, and Homestretch, each of which requires careful route-finding and surefootedness. The Narrows is a narrow ledge system with significant exposure, especially when wet, icy, or crowded. The Homestretch is a steep granite slab finish that can be slippery in poor conditions. Objective hazards include rockfall, sudden weather changes, and lingering snow or ice early in the season.
Route Outline
Longs Peak Trailhead -> Boulder Field -> Keyhole
Keyhole -> Trough -> Narrows -> Homestretch
Summit of Longs Peak
Return by the same route to Keyhole and Boulder Field