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West Fork Trail

photo: West Fork – Cogswell Dam. Photo by Jordan Glenn.

Length: 6.70 miles
Loop Trail? No
Agency: USDA Forest Service
Entry Fee? No
Parking Fee? No

Allowed Uses:

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Location: N of Pasadena in the Angeles NF off SR 39.
State(s): California
Counties: Los Angeles
Longitude: -117.87001
Latitude: 34.24203

Driving Directions

Drive up Hwy 39 to the parking area adjacent to the highway bridge crossing the West Fork, 1.5 miles from Azusa, one mile past Rincon Ranger Station.


The West Fork of the San Gabriel River is 8 miles above Azusa in the mountains. This trail is a service road that starts from the Highway 39 West Fork bridge and heads 6.5 miles west to a small campground, gaining 450 feet elevation in the process. Just past the campground, the trail rapidly becomes quite steep and eventually reaches the top of the Cogswell Dam. Several trails branch out from that point including the short Devil's Canyon segment and long continuation of this trail ending at Red Box ranger station, just South of Mount Disappointment.

Additional Details

Width: 120 inches.
Primary Surface: Asphalt
Secondary Surface: Asphalt

Average Grade: 2%
Maximum Grade: 4%
Elevation Low Point: 1,600
Elevation High Point: 2,385
Elevation Gain (cumulative): Not Available

Year Designated:

Contact Information

For more information and current conditions, contact the trail manager (listed below). For questions, suggestions, and corrections to information listed on the website, contact American Trails.

Trail management:
Jerry Sirski
US Forest Service
110 N. Wabash Ave.
Glendora, CA 91741
(626) 335-1251
[email protected]



West Fork – Cogswell Dam. Photo by Jordan Glenn.

West Fork – Cogswell Dam. Photo by Jordan Glenn.


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