I'd say if the track is 300', we would probably need 100-150' for shut down. That will shutting her down pretty down pretty hard too. We were shutting them down within about 50' in Lake Andes I'd say, just to stay out of the mud. lol. But thats for the sport quads, I am not sure what the utilities will need, they will probably need a little more to get all that weight whoa'd up.