Clyma, Highland Ridge and Raven Loop is a 8.4 mile moderately trafficked loop trail located near Brentwood, California that offers the chance to see wildlife and is rated as difficult. The trail offers a number of activity options and is accessible year-round. Dogs are also able to use this trail but must be kept on leash.

8.4 miles
2,066 feet

dogs on leash



horseback riding

mountain biking

trail running



Morgan Territory is named for Jeremiah Morgan a former gold miner who started ranching the area in 1857. Morgan Territory is located within the traditional homeland of the Volvon, one of five Native American nations in the Diablo area who spoke dialects of the Bay Miwok language. Today, the sandstone hills within the park’s 4,708 acres are seasonally adorned with more than 90 species of wildflowers, including the endemic Diablo Sunflower. Deer, coyote and even the elusive mountain lion may be seen here, and a variety of raptors frequently soar overhead. This trail begins in a heavily shaded, narrow wooded canyon and then passes through rolling hills and an old orchard. Raven Trail leads you to the top of the hill where you can see Mt. Diablo to the west, Mount St. Helena to the north, and the Delta, Central Valley, and the Sierra to the east. Take a moment at the top of Raven Trail to look around and take in the beautiful panoramic views. This trail is a very steep climb and there isn’t water available on the trails, so be sure to bring plenty. Ample parking, restrooms and water fountains are available at the Morgan Territory Road staging area. Park at the Morgan Territory Road staging area and walk towards the street-side of the parking lot. Near the park residence, there will be a sign for Clyma Trail. Follow the trail, crossing Morgan Territory Road. Go through the gate and across the small wooden footbridge. Stay on Clyma Trail for the next two miles. At the fork, make a left onto Highland Ridge and head uphill. At the next trail post, turn right onto the Raven Trail and at the next fork in the trail stay on the higher path, continuing on Raven Trail. At the next fork, turn left, in a switchback, remaining on Raven Trail. Follow Raven Trail steeply to the top of the hill. At the top of the hill turn left on Highland Ridge Trail. Take Highland Ridge Trail all the way down the hill. Keep following Highland Trail and turn right onto Clyma Trail. Clyma Trail will take you back to the staging area.

1 month ago

Great hike, amazing old groves of blue, valley and live oaks. Tons of deer, a striped skunk and even a feral pig (scary). Crystal clear view of Mt. Diablo.

1 month ago

it was a good hike, but I'd like to go when it's green during the fall

3 months ago

Good hike, some pretty steep parts. Lots of poison oak but the trail is wide. Saw 2 deer, no cows on trail. Pretty windy, only ~70 F. No biting bugs, tons of dragonflies, a couple velvet ants.

6 months ago

Hike is a beast - disregard my recording (GPS wasnt working). Plenty of parking, Signs say trail damage but didn't see any. 70% trail is exposed - First 3.5 miles are great as you go down - Raven is tough going up but has some amazing views. A little buggy but not too bad

recorded Morgan territory

8 months ago