About
Length (round trip)3.6 mi
ShapeOut-and-Back
DifficultyModerate
Elevation gain635 ft up
Typical time2 hr
TrailheadColonial Creek Campground, Highway 20
SurfaceForest switchbacks to a rocky knob
Best seasonLate July to September. This is the snowiest range in the lower 48 and high trails do not clear until well into summer.
DogsNot allowed
What you'll see ⛰️ Summit🌄 Big views🏞️ Lake

The Thunder Knob Trail switchbacks gently to a knob above Diablo Lake with views of surrounding peaks. Difficulty : Moderately easy. Distance and elevation : 3.6 miles (5.8 km) roundtrip with 425 ft (130m) elevation gain. Access : Drive State Route 20 to milepost 130, Colonial Creek Campground (24 miles east of Marblemount and 63 miles west of Winthrop). Park at the signed trailhead on the north side of the highway at the entrance to the campground. Leashed dogs allowed. The trail and parking area can be very crowded during summer months. Detailed trail description .

Tips
The colour of Diablo Lake comes from glacial rock flour ground off the peaks and suspended in the water. One of the shorter climbs on Highway 20 with a big payoff.
Location

Colonial Creek Campground, Highway 20

Other Hikers
No one has logged this trail yet.
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