GMU 157 Mill Creek Watershed
Walla Walla's locked drinking-water watershed — a tiny, brutally steep permit-only elk unit closed to everyone but a handful of drawn tag holders.
Region 1 — Blue Mountains (Eastern WA) · Last reviewed 2026-07-12
Area
21
sq mi
Public land
99%
approx.
Elevation
3,400–6,247
feet
Motorized
wilderness
access
Overview
GMU 157 "Mill Creek Watershed" is a small (~22 sq mi), essentially all-public unit that is nonetheless one of Washington's most restricted places to hunt: it is the source of drinking water for the City of Walla Walla and is closed to all human entry except elk hunting by special permit. WDFW rates it roughly 99% public land (Umatilla National Forest), but access is tightly regulated — successful branched-bull permit applicants are contacted by the U.S. Forest Service and issued an information packet of watershed rules. The country is very steep, rugged, and physically challenging, with few maintained trails; no scouting or overnight camping is allowed inside the watershed, and only the perimeter roads and trails may be used to scout. It is a coveted, low-odds draw for a hunter willing to earn it on foot.
Terrain
Extremely steep, rugged Blue Mountains headwater country draining the upper Mill Creek. Elevations run roughly 3,400 to 6,200+ ft, topping out at Table Rock (6,247 ft). The topography is severe — elevation gains exceeding 1,000 ft in half-mile stretches are common — with few maintained trails, making it one of the most physically demanding units in District 3.
Cover: Second-growth Blue Mountains forest of ponderosa pine, Douglas fir, grand fir, and subalpine fir on the higher ridges, with steep timbered draws, rock, and grass/brush faces. Dense, protected watershed cover with minimal human disturbance.
Landmarks: Mill Creek Watershed (Walla Walla municipal water source — the entire unit) · Table Rock (6,247 ft, high point) · Kendall Skyline Road (perimeter scouting access) · Umatilla National Forest (encompasses the unit) · Mill Creek headwaters
Access
Although WDFW rates the unit ~99% public land, it is CLOSED to all human entry except elk hunting by special (branched-bull) permit holders during the open season — because it is the City of Walla Walla's drinking-water source, entry is highly regulated. Successful permit applicants are contacted by the U.S. Forest Service and provided an information packet containing the watershed's hunting rules; a USFS entry permit is required and the area is closed to motorized vehicles. No scouting or overnight camping is permitted inside the watershed at any time — only the perimeter roads and trails (notably Kendall Skyline Road) may be used to scout. This is not a general-season unit; without the draw you cannot enter.
Managers: U.S. Forest Service (Umatilla National Forest) — managed as the Walla Walla municipal watershed, City of Walla Walla (water-supply interest)
Access points: Kendall Skyline Road (perimeter — scouting/glassing only) · USFS-designated entry point issued to drawn permit holders · Perimeter Umatilla National Forest roads and trails
Species notes
Rocky Mountain Elk
common qualityGMU 157 is a very small elk special-permit unit within the single Blue Mountains elk herd, and one of the GMUs managed for population stability/growth. Because entry is restricted to a handful of drawn branched-bull permit holders and the terrain is brutal, hunting pressure is minimal and bulls carry age — a genuine quality draw. The broader herd (spring 2025 estimate ~4,262) remains below pre-2017 levels with low calf recruitment (~19 calves:100 cows against a 25 objective), so yearling-bull availability is modest, but drawn hunters willing to work the steep country have a rare, low-competition opportunity.
- →This is a draw-only unit — apply for the branched-bull permit; odds are low and many hunters wait years
- →Scout only from the perimeter (Kendall Skyline Road) as required; you cannot enter to scout, so study maps, glass edges, and read the USFS packet carefully
- →Be in serious shape — 1,000-ft-per-half-mile pitches with few trails demand fitness and a solid pack-out plan
- →Contact the District 3 biologist once drawn; WDFW offers in-unit guidance to permit holders
- →Hunt the timbered draws and high benches where undisturbed bulls hold in a low-pressure watershed
Mule Deer
limited qualityMule deer inhabit the watershed's steep timbered country, but the unit is closed to entry except by special deer/elk permit holders, so any deer hunting is permit-only and incidental to the elk emphasis. With almost no hunting pressure, deer here are lightly harvested. Confirm current permit categories and rules in the pamphlet — the watershed's closed status governs everything.
- →Only pursue deer here if you hold the appropriate special permit — general-season deer hunting does not apply inside the watershed
- →If drawn, glass high timbered benches and steep north slopes from within the permitted area
- →Expect very low competition but demanding terrain and strict watershed conduct rules
Pro tips
- →You cannot hunt here without drawing the special (branched-bull) permit — this is one of Washington's most restricted units, closed to all entry otherwise as Walla Walla's drinking-water source.
- →Once drawn, the USFS mails an information packet of watershed rules and issues the entry permit — read it cover to cover; the area is closed to motorized vehicles.
- →You may only scout from the perimeter (Kendall Skyline Road) — no entry, no camping inside — so lean heavily on maps, optics, and the biologist's guidance.
- →Train for it: 1,000-ft gains per half mile with few trails make fitness and a realistic pack-out plan non-negotiable.
- →Mandatory CWD testing applies to elk/deer taken in Region 1 (100-series), and whole carcasses can't leave the 100-series — plan to debone in-region.
Watch out for
- !The entire unit is CLOSED to public entry — hunting is by special permit only; trespass into Walla Walla's watershed carries serious consequences.
- !No scouting or camping inside the watershed at any time — perimeter roads/trails only.
- !Closed to motorized vehicles for permit holders — plan an all-foot hunt.
- !Brutally steep, trail-poor terrain — physically dangerous without fitness, navigation, and a pack-out plan.
- !Early high-country snow can complicate access and the hunt.
- !CWD testing and 100-series carcass-transport restrictions apply.
- !Wildfire on the surrounding Umatilla National Forest can affect perimeter access in dry late-summer/fall.
Logistics
Walla Walla, immediately downstream to the west, is the staging hub with full gas, groceries, lodging, restaurants, and the nearest larger airport. Because camping is prohibited inside the watershed, drawn hunters day-hunt from town or camp on adjacent Umatilla National Forest ground outside the watershed boundary and hike in on the USFS-designated route. There are no services, no vehicle access, and no facilities inside the unit — plan a self-sufficient, high-fitness backcountry day hunt. WDFW's Region 1 office (Spokane Valley, 509-892-1001) and the District 3 biologist can advise permit holders; the USFS issues the mandatory entry packet.
Nearest towns: Walla Walla, WA, College Place, WA, Dixie, WA, Milton-Freewater, OR
Seasons & regulations
This page carries no season dates or regulations. Get current rules from the official Washington sources:
Research sources: WDFW — Game Management Units (GMUs) · WDFW — 2025 District 3 Hunting Prospects (GMU 157 Mill Creek Watershed) · GoHunt — Washington Unit 157 (Mill Creek Watershed) Profile · WDFW — Blue Mountains Elk Herd Management Plan
FAQ
- How big is GMU 157 in Washington?
- GMU 157 (Mill Creek Watershed) covers about 21 square miles, ranging from roughly 3,400 to 6,247 feet in elevation. Area is computed from the unit boundary polygon.
- How much public land is in GMU 157?
- Approximately 99% of the unit is public land. Primary managers: U.S. Forest Service (Umatilla National Forest) — managed as the Walla Walla municipal watershed, City of Walla Walla (water-supply interest). Always verify ownership boundaries on the ground.
- What species does the catalog list for GMU 157?
- Rocky Mountain Elk, Mule Deer. For seasons, tags, and regulations, use the official Washington agency resources linked on this page — this page carries no regulatory information.
Put GMU 157 on your map.
Boundary lines, public/private ownership, topo, and offline maps for this unit — in Baseline Maps, free for 14 days.