Trail starts with a nice incline with a few technical sections. The incline ends with a real butt-kicker climb. After a few miles of climbing you are handsomely rewarded with an awesome down hill. It is fast and technical at times. There are numerous hair-pin turns to be aware of but other than that it is very fast. Towsley is a great trail for more experienced riders who are in fairly good riding condition. Might be a little much for beginners.
How to get there:
From L.A. head North on I5 towards Santa Clarita. Take the Calgrove exit and make a left. You will pass The Old Road and turn right onto a dirt/pavement parking lot on the right side. If you get the the post office you went too far. Park outside the gate and ride in. Head straight (pass the trailhead sign on the left) toward the picnic area. Follow the paved road to the single track. It is pretty well labeled.
It gets pretty hot during the summer. If you are not up for triple digit temps ride in the morning.