Located in Colorado, the OHV driving in Boulder is known for four scenic OHV routes. The best Boulder OHV driving based on popularity are considered to be Lefthand Canyon OHV Area, Middle Saint Vrain Road, Caribou Flats Road, and Coney Creek Road.
Northwest of Boulder and northeast of Jamestown, the Left Hand Canyon OHV Area has a great network of roads totaling over 10+ miles open to OHV routes. The very old logging roads are very challenging trails now.
Northwest of Denver near Allenspark in the Arapaho National Forest, the Middle Saint Vrain Road is open to OHV users. This four-wheel drive road is not steep, but can be very rough, with large rocks and logs. It follows Middle Saint Vrain Creek and crosses some side creeks.