The campground at Jumbo Rocks in Joshua Tree National Park will be closed from tomorrow, July 16, through Friday July 20. Road crews will be working on micro-surfacing and striping projects throughout the campground. These improvements will extend the life of roads and parking areas as well as improve visitor safety at Jumbo Rocks. The campground will reopen Saturday, July 21. For more information, call Kirk Diamond at 760-367-5680.