- The Merrill Lake Unit is bordered by Merrill Lake to the south and the Kalama River to the north. A waterfall on the Kalama River is a popular site for hikers. The unit includes old-growth forest located primarily on an ancient lava flow — tree casts can be found in the lava flow — and also has a large stand of lodgepole pine, a unique feature. The Merrill Lake Unit is primarily managed for elk and black-tailed deer habitat.
- Mount Saint Helens Wildlife Area (wdfw.wa.gov)
The Mount St. Helens Wildlife Area is comprised of units that span Skamania, Clark, Cowlitz, and Wahkiakum counties, and totals approximately 10,500 acres of land. Habitat include tidal mudflats, wetlands, riparian, old-growth forest,forested floodplains, early seral mixed forest, ancient lava flows and volcanic deposits, and open grasslands. The units receive the most attention from a wildlife management perspective and provide some of the most critical winter range habitat for a portion of the Mount St. Helens Elk Herd. Many of the units support salmonid rearing and spawning habitat for threatened or endangered fish species.