The report I got was the 4 illegal OHV riders went up the Bradford Ridge Trail after crossing the creek near the hotsprings. I believe the increase in illegal OHV activity is the result of a complete lack of law enforcement from the BLM in the Juniper Flats area. Both groups entered the canyon from the direction of Juniper Flats according to the DCV eye witness. The other two who went up the PCT were later observed leaving the area in a truck with their bikes in the back along JF4. I did call the non emergency dispatch #909-383-5653. The # for emergencies is 909-383-5651. These are 24 hour phone numbers and are for both the BLM and USFS.