recommended start point would be to the right of where the trail starts, down hillers will be coming down the right outlet. Single track all the way up with switchbacks to the top. Once you start to come down from the top you will ride along a fence that will lead you to the top of Turnbull canyon on the right side. Stay on the left side of the fence until you come back to the opening on your LEFT. this will lead you back down a single track with downhills and switch backs until you pop out where you started. The right side if the fenc will lead you into a dozen different trails connected to Turnbull Canyon on the Whittier side.