Arapaho and Roosevelt National Forests · Colorado

Lost Lake

0.9 mi of trail, end to end · native material surface · trail No. 982 · trail class 2 · typical grade 12-20% · tread 18-24 inches wide · hiking, horse

Begins at the forest's mile 0, 40.7104, -105.9293 - no trailhead mapped Drive to where the trail begins

Hessie Trailhead the Forest Service's write-up

Hessie Trailhead provides access to Indian Peaks Wilderness and Devils Thumb , Lost Lake , King Lake , Woodland Lake and Diamond Lake trails. Approximately one mile of trails leading west lie outside the Indian Peaks boundary. West of the boundary, wilderness regulations apply and permits are required for camping. This trailhead is extremely popular during the summer months and parking is limited. Please use the Boulder County Hessie Shuttle on summer and fall weekends and holidays. In winter, access is typically from the town of Eldora. Parking is limited and located near the trailhead and Hessie Cabin .

COTREX Map

Diamond & Jasper Lake Designated Campsite Map

Restrictions Indian&nbsp;Peak Wilderness restrictions apply: <ul><li><strong>Motorized equipment&nbsp;and mechanized&nbsp;transportation are prohibited. </strong></li><li><strong>Pets must be on a hand-held leash at all times. </strong></li><li><strong>Campfires are prohibited year round.</strong></li><li><strong>Campsites must be at least 100 feet&nbsp;away from water and trail.</strong></li><li><strong>Group size is limited to 12 (people and livestock combined).</strong></li><li><strong>Processed weed-free feed is required for stock.</strong></li><li><strong>Practice <a href="http://lnt.org/why/7-principles/?gclid=EAIaIQobChMIhsvkoYej7AIVjYTICh2FQgqwEAAYASABEgK3nvD_BwE">Leave No Trace principles.</a></strong></li></ul>Fishing and hunting: permitted in accordance with regulations established by the Colorado Parks &amp; Wildlife.

This trailhead on fs.usda.gov

Lost Lake Trailhead the Forest Service's write-up

The Lost Lake Trailhead is a minor trailhead that provides access to Lost Lake in the Stillwater Pass Area. There is parking for about 5 cars. There are no facilities.

Horse trailer parking is limited.

Note: The access road to this trailhead is closed to motor vehicles between Nov. 15 and June 15.

View a COTREX area map here.

This trailhead on fs.usda.gov

Every trail in Arapaho and Roosevelt National Forests

All 460 trails in Arapaho and Roosevelt National ForestsFind a trailForest on fs.usda.gov

About this trail's facts

The lines are the US Forest Service's National Forest System trails layer (public domain), read 2026-10-16 and simplified for the map; the length is the line's, end to end, and the class, surface, grade and tread width are the forest's own entries where it publishes them - a forest that publishes the centreline alone has none. The trailheads and the points along the way are the Service's recreation points, and the write-ups its own recarea text, unedited. Heights come from USGS 3DEP through Terrain Tiles on AWS (Mapzen/Tilezen), read along each line and rounded; a short trail on steep ground can be off by a few tens of feet. Closures change: check the forest's own site before you go.