Skip to content
ProHunt

Unit 37A (Lemhi Zone)

Idaho Hunting Guide — Elk

Unit 37A lies in Custer and Lemhi counties and covers about 348 square miles. Named ground inside it runs from 4,575 to 11,011 feet. Idaho Fish and Game's harvest estimates put elk success here as high as 15%. Federal land covers about 91% of it. Check land status on a current map before you plan a route.

🏔️
91%
Public Land
⛰️
5,565–9,327 ft
Sampled elevation

Build your own PDF hunt guide for Unit 37A

Answer a few questions about your tag, your season and your rig, and the Field Intelligence Report builds a print-ready Idaho Unit 37A guide around your hunt: three ranked spots with morning, afternoon and evening plays, a day-by-day plan, topo maps with every pin numbered, a camp and access plan, the legal and retrieval rules for this unit, shot discipline, a meat-care and pack-out plan, and a pre-trip checklist. Every coordinate sits on land recorded as public.

Free accounts get one report a year with the top spot unlocked. ProHunt Pro includes unlimited reports, all three spots, the full camp plan, and GPX/KML downloads for onX and Google Earth. Prefer to see one first? Open the builder and pick any unit.

Elk Hunting in Unit 37A

Unit 37A lies in Custer and Lemhi counties and covers about 348 square miles. Named ground inside it runs from 4,575 to 11,011 feet. Idaho Fish and Game's harvest estimates put elk success here as high as 15%. Federal land covers about 91% of it. Check land status on a current map before you plan a route.

Where to Find Elk in Unit 37A

Idaho Fish and Game's material on unit 37A stops at the boundary — there is no agency account of where its elk live. The country below is verified; where to begin in it is our judgement, not the agency's. The unit lies in Custer and Lemhi counties. It runs to about 348 square miles.

How Idaho Fish and Game sets up elk hunting in unit 37A

Idaho Fish and Game runs its general elk seasons by elk management zone rather than unit by unit, and puts unit 37A in the Lemhi Zone, so the zone's tag rules are the ones that apply here.

The lines of the unit: Pahsimeroi River, Salmon River and Poison Creek

Idaho Fish and Game describes unit 37A as those portions of Custer and Lemhi counties within the Salmon and Pahsimeroi River drainages east of the Salmon River upstream from, but excluding, the Poison Creek drainage and north and east of the Ellis-May-Howe Highway. Read it as a frame, not as a hint about animals. Its value is practical — those are the features you will navigate by, and the ridges that separate one day's country from another's.

High ground inside the line: Flatiron Mountain, Lem Peak and May Mountain

Named high points inside the unit include Flatiron Mountain at 11,011 feet, Lem Peak at 10,959 feet, May Mountain at 10,924 feet and Red Point at 9,910 feet. Several carry a public-land flag in our data, which makes them the first places to try for a view. Elk want timber to bed in and open ground to feed on, within a short walk of each other.

Holding ground: Black Canyon, Dry Gulch and Ennis Gulch

Below them sit Black Canyon at 5,297 feet, Dry Gulch at 5,009 feet, Ennis Gulch at 4,809 feet, Cronks Canyon at 4,575 feet and Devils Basin at 9,024 feet. These are the folds worth watching, and the ones other hunters walk past on the way to somewhere steeper. Pick the one with the least road on its upwind side.

Water: Graves Spring

The water inside the unit line comes to 1 mapped stream reaches, 2 lakes and 1 stock tanks. Named sources include Graves Spring. Nothing in the data says which of them run in autumn, so a scouting trip earns its fuel.

Reading the land status

Our ownership read for this unit is approximate — it comes out as National Forest 60%, Private / Other 17%, BLM 15% and State Trust 8%, so treat it as a starting point and check a current land-status layer before you plan a route. Named ground inside unit 37A runs from 4,575 feet to 11,011 feet — more than 4,000 feet between the named features alone, so the season you draw decides which part of it you hunt.

Unit 37A terrain and land status

Measured from the unit boundary, not from the agency write-up

The lay of it

  • 5,565–9,327 ft on a terrain sample , averaging 7,662 ft ; peaks can run higher.
  • 348.2 sq mi inside the boundary.

Who owns the ground

  • National Forest — 60%
  • BLM — 15%
  • State Trust — 8%
  • Private / Other — 17%

Roughly 83% is public. Carry a land-status layer anyway — these are area percentages, not a map of where the boundaries fall.

Water on the ground

  • 1 tanks
  • 1 stream segments
  • 2 lakes

Counts from mapping data, so this is how many exist, not how many hold water in a dry year. Sitting water only pays where you find fresh tracks.

Named features inside the unit

Glass from: Flatiron Mountain (11,011 ft), Lem Peak (10,959 ft), May Mountain (10,924 ft), Red Point (9,910 ft)

Holding ground: Devils Basin (9,024 ft), Big Gulch (6,662 ft), Dry Gulch (5,505 ft), Graves Spring

Every one of these was tested against the unit polygon before it went on the map. They are starting points, not agency recommendations.

How to Hunt Elk in Unit 37A

Pro Members Only

Upgrade to Pro to unlock this section

Upgrade to Pro — $49/yr

Elk Success Rates

Rifle15%
Archery18%
Muzzleloader15%

Idaho Fish and Game's 2025 harvest estimates put elk success in unit 37A at 15% — 19 animals taken by 128 hunters. The hunter count is large enough for the percentage to mean something and small enough that a good or bad year still moves it.

These are the agency's own printed figures for this unit, not a modelled estimate and not a state average. They describe one season, so check Idaho Fish and Game's current harvest estimates before you read a trend into them.

Elk Draw Odds

SeasonTagsApplicantsDraw %Pts (n/p)
Controlled — 1st Drawing either sex (resident) 9037324.0% —
Controlled — 1st Drawing either sex (nonresident) 101169.0% —
Controlled — 2nd Drawing either sex (resident) 62013.0% —
Controlled — 2nd Drawing either sex (nonresident) 0360.0% —

Data from 2025 draw results. Each row is one residency pool — read the label before the number. This agency publishes no point thresholds, so the Pts column stays blank and these are pool odds, not what a point total draws.

Open in Draw Odds Engine

Idaho Fish and Game's 2025 first drawing for elk in unit 37A, with residents and nonresidents kept apart because they draw from different tag pools:

  • Hunt 2013 — residents 373 applicants for 90 tags, 24% drawn; nonresidents 116 applicants for 10 tags, 9% drawn
  • Hunt 2080 — residents 58 applicants for 42 tags, 72% drawn; nonresidents 5 applicants for 3 tags, 60% drawn

Idaho draws at random with no point system, so these are what that year happened to look like, not a requirement to build toward. Idaho Fish and Game reuses hunt numbers for different areas between years, so the figures are matched on the area each hunt had in 2025. Checked against Idaho Fish and Game's hunt planner draw results on 2026-06-09.

Unit Logistics & Expectations

Pro Members Only

Upgrade to Pro to unlock this section

Upgrade to Pro — $49/yr

Frequently Asked Questions

Where is Idaho unit 37A?
Unit 37A lies in Custer and Lemhi counties. Idaho Fish and Game describes unit 37A as those portions of Custer and Lemhi counties within the Salmon and Pahsimeroi River drainages east of the Salmon River upstream from, but excluding, the Poison Creek drainage and north and east of the Ellis-May-Howe Highway. It covers about 348 square miles.
What is the elk success rate in unit 37A?
Idaho Fish and Game's 2025 harvest estimates put elk success in unit 37A at 15% across all manners of take. Those are the agency's own figures for this unit, not a statewide average.
Where do you stay and resupply for a unit 37A hunt?
The nearest services our logistics pipeline finds for unit 37A are at Leadore, about 20 miles from the unit's centre, with North Challis at about 24 miles. No developed campground falls inside the unit in our data, so plan on dispersed camping.

Plan Your Hunt with ProHunt Pro

Unlock advanced tactics, the Tag-to-Trail Planner, AI hunt strategy assistant, and personalized camp and trip execution plans.

Upgrade to Pro — $49/yr

Sources & Verification

Every fact on this page is tied to a primary source below. Last fact-checked 2026-10-24.

  1. Idaho Big Game 2026 Seasons & Rules — Idaho Department of Fish and Game · supports: Game management unit boundary description, Counties the unit lies in, Controlled hunt numbers, tags and season dates · accessed 2026-10-24
  2. IDFG Lemhi Zone elk tag limits — Idaho Department of Fish and Game · supports: Season structure for the unit · accessed 2026-10-24
  3. IDFG Hunt Planner — 2025 general hunt harvest statistics — Idaho Department of Fish and Game · supports: Harvest, hunters and percent success for elk in unit 37A · accessed 2026-10-19
  4. IDFG Hunt Planner — controlled hunt drawing odds — Idaho Department of Fish and Game · supports: Applicants, tags and percent drawn by hunt, year and residency · accessed 2026-06-09
  5. IDFG GameManagementUnits and ControlledHunts_All feature services — game management units and every species' controlled-hunt areas — Idaho Department of Fish and Game · supports: Mapped extent of the unit or hunt area, Which named ground falls inside its line · accessed 2026-10-24