walk up the trail for 5 ish minutes till you see the boulder field on your right. take one of the many footpaths that cut across the arroyo.
From Comanche and tramway head east on Comanche to Camino de la Sierra. take a left then a right on sunset canyon,and another right on hidden valley follow hidden valley to the end and park.
Browse More Classics in Hidden Valley
Mountain Project's determination of some of the classic, most popular, highest rated routes for Hidden Valley:
Unknown v5 V5 PG13 Boulder
Unknown v7 ish V7 Boulder, 18 feet
Featured Route For Hidden Valley