Hidden Valley was really hidden with the only way in via the long gulch on the north side through which water drains from the valley. In the beginning of 20th century a local rancher William Keys blasted the walls on the south side of the valley to let his cattle graze there.
Now one of the nature trails in Joshua Tree National Park makes a lasso loop through the valley with views to the variously shaped rock formations and interpretive signs talking about Mojave Desert flora.
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Off-trail hiking and rock climbing are popular in Hidden Valley, although Park administration discourages these activities due to their high volume and consecutive significant negative impact.
WARNING! Hiking and outdoor related sports can be dangerous. Be responsible and prepare for the trip. Study the area you are entering and plan accordingly. Dress for the current and unexpected weather changes. Take plenty of water. Never go alone. Make an itinerary with your plan(s), route(s), destination(s) and expected return time. Give your itinerary to trusted family and/or friends.
Permit $$
NPS
Joshua Tree National Park 7-Day Vehicle Permit: $25 View Fees
Directions
Road
Paved - Car Okay
To hike From Los Angeles take I-10 east, turn to Twentynine Palms Hwy (CA-62) at exit 117, drive about 25 mi, turn right to Park Blvd in Joshua Tree. Drive 5.1 on Park Blvd (it will be Quail Springs Rd for a while) to West Entrance to Joshua Tree park, continue another 8.8 mi, turn right at the signed intersection and in 0.2 mi reach the Hidden Valley parking loop.