People come here for a one-of-a-kind experience: climbing "dunes" made of volcanic cinder at 7000-8000 feet elevation, with amazing views. This is a really unique and excellent attraction. It is also not for the faint of heart or those with low clearance or street tires. Most users come to camp along FR776 and tear it up around FR777 on quads, razors, dirt bikes, and rails. Some professional-grade hill-climbing is done here, including the 900-foot critical slope (e.g., falling-down-slope) "Hundred Dollar Hill" on the west side of Double Crater. The hill was named after the cost of broken parts on every attempted climb; today, it should probably be called a "five-thousand-dollar hill." There are dozens of other climbs with the same risk and challenge as Hundred Dollar Hill. And isn't the climb that breaks your rig the one you should call Hundred Dollar Hill? Some of us, more casual offroad enthusiasts, show up in jeeps or something similar - and will not be climbing these epic slopes. Those who come in RVs will stay close to FR776. This OHV area is right on the city limits of Flagstaff, so you can get out, have fun, and be back at home or the hotel in time for lunch. Deep snow adds another dimension to the fun and risk. This is also one of the best places to camp in Arizona because of the unlimited and uncrowded dispersed camping options all over the dunes- especially if you're an overlander capable of climbing a hill and camping along FR777 away from the groups on FR776.