Rally on the Rocks, an annual UTV event that has sparked heated debates between event organizers and county officials over the past two years, will not take place in Grand County this spring. âFollowing advice from our legal team, the entirety of the Rally will be held in San Juan County,â reads a statement on the eventâs website. Scheduled for May 11 through 15, the event will be headquartered off Highway 191, less than a mile south of the border between Grand and San Juan counties at the Dixie 4WD auto repair shop and the Moab Off Road Compound, a rental accommodation geared toward off-road enthusiasts.