Camp 4

Camp 4 is a tent-only campground in Yosemite National Park in the United States. It became notable after World War II as "a birthplace of rock climbing’s modern age." It is located at an elevation of 4000 ft on the north side of the Yosemite Valley, close to base of granite cliffs near Yosemite Falls.

Nearby boulders have long been used for bouldering, including the Columbia Boulder, which is known for the boulder problem called the Midnight Lightning, first done by Ron Kauk in 1978. It is easily recognizable by a painting of a white thunderbolt next to it.