After going under the arch on the black cobblestone road, turn left onto the dirt road and up the short, straight climb. At the top the trail bends to the right. There are two options here: the most straight forward is to follow the trail right and then left and down the hill.

The most fun is to leave the trail at a tangent to the right turn and pick up the small animal trail that leads straight down the side of the hill. Both options come together at the base of Oil Canyon itself. This is a piece of flat ground with three exits (ignoring the way you just came in). The one to the right is a dead-end after a few yards and the left hand one leads downhill; it is the central one you want. The base of the climb can be muddy after rain or sandy in dry weather but either way it gets (a little) better after a while. The climb is fairly steep and passes a few oil wells between steep valley sides. Continue up, following the trail as it bends left and right. The ground eventually flattens out and you can see a lake in the foreground to your right and some buildings in the middle distance. This is a JUNCTION where Oil Canyon rejoins Twin Ridge.