The Bureau of Land Management (BLM) manages the Glade Run Recreation Area. This area is a great spot for OHVing and mountain biking. The Glade has 19,000 acres of sandy arroyos, slick rock, and rolling terrain. The recreation area is split into two off-highway vehicle use zones. The northern three-quarters of the Glade are managed for limited trail use and 3,800 acres on the south end are managed as an open OHV area. Approximately 42 miles of marked trails for motorized trail bike and mountain bike riders are located in the limited OHV portion of the Glade. Challenging slick rock and wide sandy washes provide fun for off road enthusiasts in the open OHV section. Rock crawling, an extreme form of off road driving using vehicles, from stock to highly modified, to surmount obstacles, is a popular activity. In rock crawling, drivers maneuver four-wheel-drive vehicles over very harsh terrain. Driving locations include boulders, slickrock, mountain foothills, rock piles, mountain trails, etc. Rockcrawling is about slow-speed, careful, precise driving. Rock crawlers often drive up, down and across obstacles that would appear impassable to the average person.