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Hiking
Hike the challenging 10.5-mile Lost Lake Trail #91 in Wheeler Peak Wilderness, gaining 2176 feet to a high-alpine lake.
Last updated: February 26, 2026
Waypoints
Start point
Parking
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8.46 km
Highlight • Lake
Tip by
17.0 km
End point
Parking
Way Types & Surfaces
Way Types
16.3 km
686 m
Surfaces
16.3 km
686 m
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Tuesday 26 May
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This route was planned by komoot.
The trailhead for Lost Lake Trail #91 is located near Red River, New Mexico, within the Carson National Forest. Specific parking details are usually available through the Forest Service. It's advisable to check the USDA Forest Service website for the most current information on access and parking availability.
This trail is generally rated as difficult, often described as a "Black Diamond" or "Hard" physically. It involves a significant elevation gain of 663 meters (2,175 feet) over its 16.96 km (10.5 miles) length, reaching an elevation of 11,495 feet at Lost Lake. Due to the strenuous ascent, varied terrain with switchbacks, rocky sections, and some exposure near the lake, it is not recommended for beginners or young families. Hikers should be prepared for a demanding experience.
The terrain is varied and challenging. You'll encounter smooth singletrack, rocky and root-filled sections, and numerous switchbacks. As you gain elevation, the trail traverses steep avalanche paths. The final mile to Lost Lake becomes particularly narrow with sections of exposure between small cliff bands, where caution is advised due to potential rock and debris falls. During monsoon season, the trail can also be prone to wet mud and rock slides, increasing the risk of lightning. Always check weather forecasts before heading out.
The trail offers diverse and breathtaking scenery. You'll start through fir and spruce forests, transitioning to an alpine environment with open meadows and aspen groves. Numerous vista points provide spectacular views of the Sangre de Cristo mountains, especially above 11,000 feet. The ultimate destination is the high-alpine Lost Lake itself, nestled at 11,495 feet.
Lost Lake Trail #91 is primarily hiked as an out-and-back route. However, it can be combined with the East Fork Trail #56 to form a longer loop, offering a different return experience.
Yes, dogs are allowed on the trail. However, they must be kept on a leash at all times to protect wildlife and ensure the safety of other hikers.
The trail enters the Wheeler Peak Wilderness within the Carson National Forest. While there isn't typically an entrance fee for the forest itself, specific permits might be required for certain activities or overnight stays within the wilderness area. It's best to check the USDA Forest Service website for the most up-to-date regulations regarding permits for the Wheeler Peak Wilderness.
The best time to hike is typically during the summer and early fall months when the snow has melted and weather conditions are more stable. However, be aware that monsoon season (July-August) can bring afternoon thunderstorms and increased risk of wet mud and rock slides. Always check local weather forecasts before your hike.
As the trail enters the Wheeler Peak Wilderness, you should be aware of specific regulations designed to protect this fragile environment. These often include Leave No Trace principles, restrictions on group size, and specific rules regarding camping and campfires. For instance, camping and campfires are restricted near the immediate shoreline of Lost Lake. Always consult the USDA Forest Service website or local ranger station for the most current wilderness regulations.
Yes, fishing for stocked native cutthroat trout is permitted in Lost Lake, provided you have a valid New Mexico state fishing license. Remember that camping and campfires are restricted near the immediate shoreline to protect the fragile alpine ecosystem.
Yes, the route also passes through sections of the Lost Lake Trail #91 (83%), Middle Fork (487) (27%), and Middle Fork Trail (487) (7%). This allows for potential connections to other trails in the area, such as the East Fork Trail #56 if you're looking to create a loop.