BPX 2-Day: Lost Lake (Roosevelt National Forest)

This two-day backpacking trip to Lost Lake begins at the Hessie Trailhead near Nederland, following a 2.1 mile route with about 868 feet of elevation gain through lush forest and flower-filled meadows. The trail climbs steadily along Middle Boulder Creek before reaching the serene alpine basin of Lost Lake, nestled at about 9,830 feet beneath rugged peaks. After a peaceful night of camping beside the lake, enjoy a relaxed 2-mile descent the next morning back to the Hessie Trailhead.

Suggested Backpacking Section (BPX) itinerary for 2-day trip to be used for CMC trips led by BPX leaders for BPX members:

This two-day backpacking adventure to Lost Lake begins at the Hessie Trailhead near Nederland, following a 2.1 mile route with about 868 feet of elevation gain through aspen groves, pine forest, and wildflower meadows alongside Middle Boulder Creek. The trail leads to the tranquil alpine basin of Lost Lake, nestled at 9,830 feet beneath the rugged Indian Peaks. After setting up camp near the lake’s edge, an afternoon excursion explores the surrounding area, including two scenic overlooks that reveal sweeping views of forested valleys and jagged ridgelines. As dusk settles, the calm waters mirror the soft alpenglow, creating a perfect mountain evening before a peaceful night under the stars.

In winter, Lost Lake offers a beautiful and more solitary backpacking option, with the same route transformed into a snow-covered wonderland ideal for those equipped with snowshoes or winter gear. The frozen lake and quiet forest create a pristine alpine setting, where crisp air, glittering snow, and the silence of winter combine for a truly memorable cold-season wilderness experience.

Day 1: Park at the Hessie TH. Follow the Devils Thumb Trail #902 to the Lost Lake Trail and Lost Lake (2.1 miles, +868 ft)

Route: Day 1

Day 2: Break camp and return to the Hessie Trailhead using the same route. (2.1 miles, -868 ft)

Route: Day 2

Overall Route: 4.2 miles, +-868 ft.

NOTES:

Always practice Leave No Trace techniques.
There are 8 designated campsites available on a first come, first served basis.
Lost Lake is outside the Indian Peaks Wilderness, camping permits are not required.
Parking for the Hessie Trailhead is along the 4^th of July Road. In the summer a shuttle from Nederland Middle Senior High School is available on weekends. In the winter the 4^th of July Road is plowed to the Hessie Trailhead and closed beyond that point.
In the winter, the west side of the lake is an avalanche risk area. Only camp on the east side.
Driving Directions: From the Colorado Mountain Club (Golden, CO) to the Hessie TH.