About
Length (round trip)10.4 mi
ShapeOut-and-Back
DifficultyStrenuous
Elevation gain5,000 ft up
Typical time7 hr 45 min
TrailheadDiablo townsite, Highway 20
SurfaceRelentless steep switchbacks to a fire lookout
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

This difficult trail ends on a high ridge with spectacular views of peaks and lakes. The trail switchbacks relentlessly and steeply. It can be hot and dry; bring plenty of water. At approximately 4 miles (6.4 km), cross Sourdough Creek (use caution in the spring when the creek may run high or be bridged by only a thin layer of snow). The last mile crosses beautiful flower filled fields and ends at a historic lookout (closed to the public). Difficulty : Strenuous. Distance and elevation : 10.4 miles (16.7 km) roundtrip with 5,100 foot (1,554 m) elevation gain. Access : Drive State Route 20 to milepost 126. Turn off SR 20 at the sign for the town of Diablo. The trail begins behind the domed swimming pool. Leashed dogs allowed to the national park boundary (first 3 miles/4.8 km). Detailed trail description .

Tips
Gary Snyder and Philip Whalen both staffed this lookout, and Kerouac wrote about the neighbouring one. Five thousand feet of climbing in five miles with almost no respite. Carry four litres.
Location

Diablo townsite, Highway 20

Other Hikers
No one has logged this trail yet.
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