5.4 mi from the trailheadTrinity River (CA)
Campground
Hike
Thumb Rock
- Near Thumb Rock
- Inside Shasta National Forest
- 4,150 ft of climbing
12.3 mi loop · 4,150 ft gain · 7,579 ft high point · Very hard
From Boulder Lake Trailhead, a loop with Boulder Lake, Tracy, Lilypad Lake, and Poison Canyon
In Shasta National Forest · California · U.S. Forest Service
About this hike
This 12.3-mile loop from Boulder Lake Trailhead climbs 4,150 feet via Boulder Lake, Tracy, Lilypad Lake, and Poison Canyon Trails.
Elevation
4,150 ft of gain, the approach both ways included.
Camp near here
The closest places to sleep, measured from the trailhead.
- 5.4 mi from the trailhead
- 7.5 mi from the trailhead
More hikes nearby
Ranked the same way, within twenty-five miles.
