game management unit · Washington Department of Fish and Wildlife
GMU 157 Mill Creek Watershed
Washington, United States
The map opens on this unit. Turn on Hunting units in Layers to see its boundary with public land, your pins and the forecast.
About GMU 157 Mill Creek Watershed
GMU 157 Mill Creek Watershed is a game management unit in Washington, United States, set by Washington Department of Fish and Wildlife. It covers about 57 km² (22 mi²). No town of the HuntGrid list lies inside it; the nearest is Walla Walla, about 24 km from its edge.
HuntGrid draws its boundary from Washington Department of Fish and Wildlife's data for the 2026 season. The agency's regulations say which species and seasons use it.
- Unit code
- 157
- Area
- 57 km²
- Area (miles)
- 22 mi²
- Boundaries
- 2026
Public and protected land mapped inside it
HuntGrid's public land layers map about 55 km² of public or protected land inside it, 96% of the unit. Some protected land is privately owned (a conservation group's, for one). By manager, as the source names it:
| Manager | km² | Share |
|---|---|---|
| Forest Service Region 06 Pacific Northwest | 52 | 92% |
| Other or unnamed managers | 2.4 | 4% |
| Bureau of Land Management | 0.4 | under 1% |
Boundaries are approximate and aren't legal descriptions. Public land doesn't always mean you can hunt there: check your local regulations and posted signs.
Public land: U.S. Geological Survey (USGS) Gap Analysis Project (GAP), 2025, Protected Areas Database of the United States (PAD-US) 4.1
Seasons and regulations
Season dates, bag limits and licences for GMU 157 Mill Creek Watershed are in Washington Department of Fish and Wildlife's official regulations. HuntGrid shows a season in the app only once a person has checked it against them.
Official regulations: Washington Department of Fish and Wildlife
Units around it
Next to it in the same unit system
Other hunting units that cover part of it
What HuntGrid shows for GMU 157 Mill Creek Watershed
- Its boundary on the map; tap inside it for the unit's card with the agency's regulations link.
- Public land and the other hunting units in the same view, each with its source.
- Season dates once a person has checked them, and legal shooting hours where the rule is checked.
- Hourly wind with a scent cone for every stand, and official weather alerts.
- Offline maps: download the area and use the map, your pins and the forecast with no signal.
Questions
How big is GMU 157 Mill Creek Watershed (game management unit)?
About 57 km² (22 mi²), as HuntGrid maps Washington Department of Fish and Wildlife's boundary.
How much public or protected land is in GMU 157 Mill Creek Watershed?
HuntGrid's public land layers map about 55 km² of public or protected land, 96% of the unit; the largest share is managed by Forest Service Region 06 Pacific Northwest. Public land doesn't always mean you can hunt there.
Where are the season dates for GMU 157 Mill Creek Watershed?
In Washington Department of Fish and Wildlife's official regulations: https://wdfw.wa.gov/hunting/regulations/big-game
Which units are next to GMU 157 Mill Creek Watershed?
In the same unit system: GMU 154 Blue Creek, GMU 162 Dayton and GMU 169 Wenaha.
More on huntgrid.net
Sources
Unit boundary: Washington Department of Fish and Wildlife. Boundaries for the 2026 season.
HuntGrid isn't affiliated with Washington Department of Fish and Wildlife. The official regulations and maps have the final word.