Idaho GMU 31
Strategic hunting data, boundary maps, and published IDFG season dates for Game Management Unit 31.
Unit 31 Overview
Idaho Game Management Unit 31 (GMU 31) is in the Brownlee Elk Zone. Season records in this guide list Black Bear, Elk, Mule Deer, Pronghorn Antelope, White-tailed Deer. This unit features high-elevation rugged terrain, requiring physical preparation and optics for cross-canyon spotting. About 49.4% of Unit 31 is mapped as public land. This is not parcel-level access authorization; verify boundaries, closures, and legal access before entering.
Landscape Analysis
Surface Management
Agency shares from IDFG Hunt Planner; this is not parcel-level access authorization.
Listed agency shares total 98.95%; 1.05% is not itemized in this breakdown.
2026 season dates, from Idaho Fish and Game
Pulled from the IDFG Hunt Planner API (2026). Idaho re-issues seasons each year and corrects its own systems between editions, so Idaho Fish and Game remains the sole authority for legal dates, tags and restrictions. Confirm before you hunt.
Check the IDFG Hunt PlannerPublished Season Schedule
The earliest opening in our Unit 31 records is Apr 1. Each species, tag, weapon, and hunt area has its own dates and restrictions below.
EElk Seasons
- GeneralAny WeaponGeneral B TagAntlerless · Area Private agricultural lands in Unit 31Season Dates
- GeneralArcheryGeneral A TagAntlerless or AntleredSeason Dates
- ControlledAny WeaponControlled Hunt Either SexAntlerless or Antlered · Hunt 2112 · 50 permitsSeason Dates
- ControlledAny WeaponControlled Hunt Youth OnlyAntlerless or Antlered · Hunt 2163 · 50 permitsSeason Dates
- ControlledAny WeaponControlled Hunt AntleredAntlered · Hunt 2008 · 75 permitsSeason Dates
- ControlledAny WeaponControlled Hunt AntlerlessAntlerless · Hunt 2073 · 150 permitsSeason Dates
- ControlledAny WeaponControlled Hunt Youth OnlyAntlerless · Hunt 2156 · 100 permitsSeason Dates
- ControlledAny WeaponControlled Hunt AntlerlessAntlerless · Hunt 2074 · 150 permitsSeason Dates
- ControlledAny WeaponControlled Hunt AntleredAntlered · Hunt 2009 · 75 permitsSeason Dates
- GeneralAny WeaponGeneral B TagAntlerlessSeason Dates
WWhite-tailed Deer Seasons
- GeneralArcheryGeneral ArcheryAntlerless or AntleredSeason Dates
- GeneralAny WeaponGeneral Any WeaponAntlerlessSeason Dates
- GeneralAny WeaponGeneral Any WeaponAntlerless or AntleredSeason Dates
BBlack Bear Seasons
- GeneralAny WeaponGeneral Any WeaponEither-sexSeason Dates
- GeneralDog TrainingGeneral Any WeaponEither-sexSeason Dates
MMule and White-tailed Deer Seasons
- GeneralArcheryGeneral ArcheryAntlerless or AntleredSeason Dates
- GeneralAny WeaponGeneral Any WeaponAntleredSeason Dates
- ControlledAny WeaponControlled Hunt AntleredAntlered · Hunt 1022 · 30 permitsSeason Dates
PPronghorn Antelope Seasons
- ControlledAny WeaponControlled Hunt Either SexAntlerless or Antlered · Hunt 4003 · 5 permits · Area 31-1Season Dates
- ControlledAny WeaponControlled Hunt Youth OnlyAntlerless or Antlered · Hunt 4050 · 15 permits · Area 31-1Season Dates
Harvest Trends & Success
Harvest statistics for Unit 31
Seven seasons of hunter counts, harvest totals and success rates, broken out by weapon — straight from Idaho Fish and Game.
Controlled Hunt Draw Odds
Draw odds for every hunt in this unit
Resident and nonresident draw odds, permits offered, and applicant counts for the 2026 Idaho controlled hunt drawings.
Unit 31 Boundary
That portion of WASHINGTON COUNTY within the following boundary: beginning at Brownlee Dam on the Snake River, then southeast on State Highway 71 to U.S. 95, then southwest on U.S. 95 to the Snake River at Weiser, then down the Snake River to the point of beginning.
Brownlee Zone Context
West-Central Idaho — Snake River Reservoirs
The Brownlee elk zone consists of Unit 31. Use that unit's boundary to distinguish a Brownlee-zone hunt from neighboring Hells Canyon and Weiser River country; a reservoir name alone is not enough to establish where your tag is valid.
Consider Cambridge or Council when arranging supplies, according to your approach. Plan drinking water, heat exposure, and meat cooling around the actual forecast and pack-out distance.
See all units in the Brownlee ZoneCommon Questions About Unit 31
Where is Idaho GMU 31?
Unit 31 sits in the Brownlee Elk Zone. The landscape is predominantly forest/mountains, requiring appropriate gear and preparation.
What species can I hunt in Unit 31?
Unit 31 season records list Black Bear, Elk, White-tailed Deer, Mule Deer. Confirm current dates and weapon legality with Idaho Fish and Game before applying or buying tags.
Are offline maps useful in GMU 31?
Plan for gaps in cell service. Roam Idaho's current web map requires a connection, so download an official offline map or carry a paper map before entering the field.
Is Unit 31 mostly public land?
Unit 31 is approximately 49.4% public (mixed public/private). Public-land share is not parcel-level access permission; verify ownership boundaries, legal routes, and closures before entering.
Before hunting Unit 31
- Compare Idaho season and tag planning information against the specific hunt number and species you intend to pursue.
- Review public-land access and land-manager resources to check entry routes, road restrictions, and closures.
- Use the backcountry hunting preparation guide to plan navigation, weather protection, and the trip back out.
Terrain Breakdown
Included with Roam Pro — $3/month, 7-day free trial.
Land Access
Species associated with Unit 31. Open a guide for habitat, timing, and regulation context.
Field Reminder
Use this page and the connected map for planning, then carry an official offline map and confirm current seasons, closures, and access before heading out.