The name is a corruption of “Santa Oline” canyon. This starts at the upper Chantry parking lot to the left of the Forest Service housing. Follow the asphalt road past the water tanks and the Upper Winter Creek Trail head to the heliport on the ridge.
Look back to find the dirt fire road which takes you a long 3 miles through the upper Santa Oline watershed to a point overlooking Little Santa Anita Canyon and the LA basin.
This is popular with mountain bikers and makes an excellent night hike – lay out on the rain-gathering fire tank and gaze at the stars. Stay out of the telecommunications equipment.
If you’re up for it there is a scratch tail that runs a ridgeline between the water tank and the heliport.