Was done with my ride around 6:30 tonight putting my bike on the car,and in comes a dirt bike right onto the north loop!! 3 or 4 of us bikers were in the lot, the guy on the motorcycle didn't seem to care, or even look. I called the DNR hot line right away, while I was HOLD, the dirt bike went back flying down Hess, must have got out at the turn off in the trail for the east loop, I continue to be on HOLD, finishing packing up my gear, get in the car, once I made it to Grange Hall, they take me off hold, ask what happened, gave my story, they took my number. Said a officer will call me. Nobody called back. Getting the impression the DNR Hotline does not act with any urgency!!