This thin, triangle-shaped unit runs from Riffe Lake in the east to I-5 in the west from Centralia, south to where I-5 crosses the Cowlitz River. There are small tracts of state ground with the largest tracts in the east close to the Cowlitz Wildlife Area – Peterman Ridge unit along the western border adding in 6,840-acres of public access, primarily for blacktail deer. Although this is a fairly flat GMU by Washington standards, there is a bit of high ground in the east, including Bellicum Peak at 2,310-ft and the 2,800-ft ridgeline above the Tilton River. The bulk of this unit is comprised of very small pieces of private land used for farming, and rural properties to the point where the Lewis and Clark State Park looks like a large piece of land.

There are a good number of deer here, but no big bucks. It can be hard to gain access to private land in this unit.