Park along Turri Road at the trailhead. This trail starts with a steep climb immediately leading into nice flowing hills, and is a great fast and flat singletrack with a few dips.
About a 1/2 mile in there will be an intersection with the Lower Crespi Trail
on your right, you can take this as it will reconnect with Chumash. Continuing on Chumash, you'll come to a steep hill climb at about 3/4 mile; there are no obstacles on the climb.
The top of the climb will be a four-way intersection with the Lower Crespi Trail
. To the right will take you back down to Chumash at the previously mentioned intersection. To the left will take you to the Park Ridge Trail
as will straight ahead. Continuing straight on Chumash will take you across a small wood bridge and up a short steep climb to the Park Ridge Trail