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Boulder, CO: Lost Lake (Winter Route)

Snowshoe into a small mountain lake on this gentle, 5-mile out-and-back in Indian Peaks Wilderness–a perfect winter getaway from the city.

Trip Tools

This 5-miler offers an easy-going alternative to Boulder’s higher-intensity hikes. Begin by following Hessie Road for a low-grade climb to views of Eldora Ski Area and the Indian Peaks Wilderness above Lost Lake. This route begins where winter road maintenance ends on Hessie Road (1.3 miles from the Hessie Trailhead), offering a peaceful and pretty addition to the trail.
Pass trailhead signs on your left and follow the Devil’s Thumb Trail #902. Stay left at the 3-way junction with the Devil’s Thumb Bypass before turning left again at the Lost Lake Trail #813. The trail switchbacks gently uphill and crosses several bridges as it follows Boulder Creeks South Fork before a final uphill push lands at the lakeshore.
There are 8 designated campsites around the lake and well-worn, user-created trails to follow around its shore. Tip: This popular and easy-to-access trailhead can be overrun on busy weekends. Park only in designated areas, and be prepared for a little longer walk if necessary to avoid a costly parking ticket.
-Mapped by Genny Fullerton

To Trailhead

From Boulder drive 15 miles west on CO 119 to Nederland and take the third traffic circle exit onto S. Bridge St. In 0.6 mile, turn right onto CR 130 and continue 4 miles (the road becomes Eldorado Ave., then Hessie Rd.). Park only in designated parking areas.

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