The Peterman Ridge unit is the largest on the Cowlitz Wildlife Area, with 6,840 acres south of Morton. It is managed for the pileated woodpecker (a sensitive species), black-tailed deer, and Douglas squirrels. Its forested wetland areas on Peterman Ridge also provide habitat for beaver, amphibians and other wetland- dependent species. Wildlife use throughout the unit is diverse, including elk, black bear, cougar, grouse, and turkey.

There is approximately 10 miles of multiuse trail. The trail is composed of single track trail connecting forest roads. A variety of habitats and species can be found on this 6,855 acre unit -- the largest unit on the Cowlitz Wildlife Area. There are trout fishing opportunities on this unit as well.

From I-5: Head east on Highway 12 (27.3mi), Turn right onto Highland Valley Road (404ft), Continue on Peterman Hill Road (0.9mi), Turn left into trailhead parking lot.

Restrooms and ample parking at trailhead.