Just as you think you might be geting tired the trail seems to give you a needed break until the next hill. Its easy to figure out the line after about 2-3 rides. The 4 mile loop can easily be riden without coming off of the saddle. My favorite part is the first 2 miles. Enter park and proceed west to gate.
Trailhead is due north of gate.
This a very fun set of trails, single track with lots of curves, tons of ruts, and a couple of good drops. Not a difficult set of trails, but you must have some skills to ride this one. Look for jumps halfway through trails, they are worth stopping for. Upper lake offers paved riding for wussies. Trail located behind Murry park which is just north of lake Hefner on Hefner Rd.