This trail has four loops the beginner trail is only one mile long, but the intermediate is 2 miles and the advanced is around 4 miles. If you turn left at every crossing you will go around the out side of everything and get about 6.5 miles in. Approvements are happening all the time because there is a group from Tulsa who maintains the trail on a monthly basis. For more information contact that group at www.keystoneoffroad.com. The terrain is rocky with a lot of switch backs for those long climbs. The beginner and intermedate trails is smooth with a lot of turns and a little climbing. It is all ridable but some part take a little more practice then others.