Take 1 part Dr Seuss images, add a heaping spoonful of sand, mix well and slowly scatter large rock outcroppings into the dry mix.  Pre heat your oven to a high of 91.  Avoid park rangers.  Slowly add broken-down sunbleached pickup trucks and then pepper the landscape with frightened run-out climbers on all sides of the rock chunks.  Wait one month and remove yourself from Joshua Tree, you should have a slight sunburn, worn out guide tennies, and throbbing fingers.