- The White Island Unit is accessible ONLY by boat. It has floodplain habitat located on White Island in the Columbia River upstream of Puget Island. Habitat on this unit is maintained for the Columbian white-tailed deer, a federally-listed endangered species. The unit is a designated Natural Area Preserve for its undisturbed black cottonwood-willow riparian habitat, freshwater wetland, and the presence of Columbian white-tailed deer.
- 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.