Jumbo Rocks Campground lies amid the huge, steep rock formations for which Joshua Tree National Park is known. Close proximity to many boulders and rock formations, it is a popular camping location for families with kids. Jumbo Rocks is one of four campgrounds in the park that can be reserved during the busy winter season; it is open on a first-come, first-served basis from June 9 through August 30. Travelers who enjoy warm, dry winters flock to Joshua Tree from October through May, when temperatures hover between 70-90 degrees during the day and drop to a 40-60 degree range at night. Summer is the park's off-season due to the uncomfortably-high desert heat. Jumbo Rocks is at an elevation of 4,380 feet.