I have an IMS 3.1 gal tank but it can be done with the stock tank. We ride from Pine Valley through four corners to the lower campground. We go left out of the main entrance to the campground and follow the fire road all the way around to Los Pinos Mtn. Go half way up and split right on the single track that takes you back to the campground. Like I said, by the time we get back to the Pine Valley exit, we are right at 50 miles. I've done it with the stock tank with having to give some gas to a friend who ran out. Hope this helps.