GMU 506 - Willapa Hills, Washington

Low-to-mid-elevation volcanic and sedimentary hill country rising from roughly 200 ft along the Columbia River bottomlands to just over 2,600 ft at the northern ridge. Dominated by dense Douglas-fir, western red cedar, and western hemlock second-growth forests interspersed with clear-cut patches in various stages of regeneration. Valley floors along the Willapa River, Grays River, and Chehalis River tributaries hold brushy riparian corridors. The unit is bounded on the north by Road 6 and on the east by the Chehalis and Elochoman Rivers. No federally designated wilderness areas are within the core unit, but the patchwork of industrial timber blocks creates de-facto limited-access zones.

Approximately 89% of the unit is private land, primarily industrial timberlands owned by large timber companies (Weyerhaeuser, Green Diamond, and others) that either restrict public access entirely or sell limited hunting access permits. The remaining 11% is state-managed DNR forestland concentrated in two main blocks, which represent the primary free public hunting ground. Washington DNR lands are open to public access by default. No Gifford Pinchot National Forest acreage falls within GMU 506 proper — that national forest is in the adjacent GMUs to the east. State Route 6 and State Route 4 are the primary corridors; numerous DNR forest roads branch from these. Hunters should verify road gates and seasonal road closures with DNR before trips. Willapa National Wildlife Refuge portions are closed to big game hunting.

Predominantly Douglas-fir and western red cedar closed-canopy forest at mature stages, transitioning to dense brush (vine maple, salmonberry, red alder) in clear-cuts 5-15 years post-harvest. Valley bottoms hold red alder riparian strips. Elk and deer forage quality is highest in 3-10 year clear-cuts with abundant forbs, grasses, and shrubs. Older clear-cuts (15-25 years) provide bedding cover. The rain shadow effect is minimal — western Washington rainfall supports lush, thick understory that limits visibility and makes spot-and-stalk hunting challenging.

Roosevelt elk move between timbered hillsides and clear-cut edges, concentrating in early successional clear-cuts and brushy regeneration areas during hunting season where browse is abundant. Elk use river corridors (Willapa, Chehalis drainages) as travel routes and tend to move from higher ridgelines down to valley floors as weather cools through October and November. Black-tailed deer follow similar edge patterns, keying on clear-cut boundaries and old logging roads during dawn and dusk. Elk move onto private timber company ground heavily, making access the primary challenge. Bear activity tracked through the season into fall, using riparian corridors and berry patches.

The Cathlamet area within GMUs 506 and 530 is closed to all deer and elk hunting except by special permit to protect the Columbian white-tailed deer, a federally listed species. Hunters must be aware of this closure when hunting near the Columbia River bottomlands. No wilderness area restrictions apply within the main unit. The Willapa Hills Black Bear Management Unit (BBMU 14) has reduced seasons and a 1-bear bag limit due to above-average female mortality rates — one of only a few WA BBMUs with this restriction. Dog or bait use for bear hunting is prohibited statewide. Elk west of I-5 are classified as Roosevelt subspecies. The unit was noted among the higher general-season elk harvest GMUs in District 10 in 2021 (112 elk harvested). Unit pressure is moderate to high given proximity to the Portland-Seattle corridor. Access to productive private timber ground is the defining challenge.