Pike and San Isabel National Forests · Colorado
Trailheads Lost Park Trailhead Drive there · North Fork Trailhead Drive there
Twin Eagles Trailhead provides access into Lost Creek Wilderness on the Brookside-McCurdy Trail. Once inside the wilderness area, Brookside-McCurdy can be combined with several other trails to form your own loop.
Accessibility <p>This trail is open year round; however, access may be difficult in the winter months.</p>
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.