Jumbo Rocks is the site of a large outcrop of monzogranite rocks, their extraordinary formations ranging from giant, weather-worn boulders to linear, geometric patterns attracting everyone from artists and photographers to rock-scramblers and serious climbers. It is also the location of one of the park's largest group campgrounds, a first-come, first-served facility with 124 sites.
If you go:
Follow the 1.7-mile nature trail from Jumbo Rocks to nearby Skull Rock, one of the most popular sites in the whole park.
Links:

Loop Road
Chuckwall, California USA
Mailing address:
Joshua Tree National Park
74485 National Park Drive
Twentynine Palms, California 92277 USA
Phone Numbers:
Joshua Tree National Park
+1 (760) 367-5500
+1 (760) 367-5500