Trail Overview

Grassy Gulch Road is a steep, rocky, single-lane road that is known for access to the hiking trail that goes to Ptarmigan Lake. There are turnouts for oncoming traffic and some dispersed camping. Along with being rocky, there are switchbacks, many drainage swells, a few shallow water crossings, and part of the trail is a shelf road. It is a constant climb, but you are rewarded at the end with a panoramic view of the surrounding mountains.

Photos of Grassy Gulch Road FS 349

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Difficulty

This is a steep, very rocky trail with switchbacks and portions of shelf road.

Technical Rating

Jack Cauthen

Jun 08, 2026

Open

Trail is clear up to Ptarmigan lake trailhead. Higher up the trail is blocked by snow

Andrew C

Jun 13, 2025

Open

Fun, fun, fun - moderate challenge and beautiful. I'll return later this summer to get to top and lake. The top of the trail (just at treeline) was impassable by anything more than 2 wheels due to snow drifts. Walking to ptarmigan lake is impossible due to snow and runoff.