GMU 157 - Mill Creek Watershed, Washington

Extremely rugged Blue Mountains terrain in the Mill Creek drainage east of Walla Walla, WA. The unit spans roughly 22 square miles (approx. 16,000 acres in WA plus 8,000 acres in OR) entirely within Umatilla National Forest. Table Rock is the high point at 6,247 ft; the unit floor along Mill Creek drops to approximately 3,400 ft. Elevation gains exceeding 1,000 ft in under half a mile are common. Ridgelines are mostly open with steep north-facing slopes heavily timbered in ponderosa pine, Douglas fir, grand fir, and subalpine fir providing dense bedding cover. South-facing slopes offer native grasses, forbs, and open benches. Mill Creek and Green Fork have carved deep, steep valleys. No internal roads exist — hunters face only 'up or down' navigation on elk trails that even horses and mules cannot always traverse.

99% Umatilla National Forest (public land), but the ENTIRE watershed is a permanently CLOSED AREA under WAC 220-413-180. The only legal entry is for WDFW special-permit deer or elk holders during the established open season, and each hunter must additionally obtain a U.S. Forest Service entry permit before accessing the unit. No motorized vehicles. No camping inside the boundary. No scouting is allowed inside the watershed before opening day — perimeter roads (notably Kendall Skyline Road) are the only legal pre-season scouting option. One non-hunting companion is allowed for meat packing; outfitter/guide services cannot be hired for this unit. The area is otherwise closed to ALL public access (no hiking, birdwatching, equestrian use) 355 days per year.

Primary forest types: ponderosa pine, Douglas fir, grand fir, and subalpine fir on north-facing slopes and shaded drainages. South-facing slopes and open ridges support native bunchgrasses, forbs, and shrubs providing critical forage. The Mill Creek and Green Fork riparian corridors support dense riparian vegetation. The protected watershed status means no timber harvest, no grazing allotments, and no road construction — habitat is essentially undisturbed old-growth and mature forest interspersed with natural openings.

Elk are the primary species and have occupied the watershed since being introduced in 1918. Elk use steep north-facing timbered slopes for bedding cover and move to open south-facing benches and ridgelines to feed on native grasses and forbs. Countless ridges are crisscrossed with elk trails visible from the perimeter. The unit borders Oregon, and the Oregon portion of the Umatilla NF (additional ~8,000 ac) functions as a connected refuge that is not hunted, providing a sanctuary effect. Elk populations in the broader Blue Mountains have declined from historic highs — 1954 inaugural hunt had abundant seven-point bulls; current herd quality remains good but reduced. The closed-access, non-motorized environment means elk experience virtually no hunting pressure or human disturbance outside the brief 14-day season.

This is one of the most unique and restrictive hunting units in Washington — a municipal watershed that doubles as a de facto wildlife sanctuary with a brief, highly controlled hunting window. The Walla Walla city watershed has been protected since 1918; elk hunting began in 1954. The no-scouting, no-camping, no-motorized requirement demands that hunters commit to a point-accumulation strategy and arrive physically prepared for an extremely demanding backcountry foot hunt. Draw pressure is significant (512 applicants for 15 permits in 2025 = ~2.9% raw draw odds; avg successful applicant held ~13 preference points). Deer hunting is completely closed in this GMU — no general or special deer season exists. Only elk hunting via special permit is authorized. Adjacent units include GMU 149 (Pataha), GMU 162 (Dayton), GMU 166 (Tucannon), GMU 169 (Wenaha), and GMU 172 (Mountain View). Post-draw, successful hunters receive a WDFW info packet and must separately coordinate a USFS entry permit before the season.