Idaho Unit 31 Elk Hunting Guide

Idaho Unit 31 sits in the southwestern part of the state and offers elk hunters a substantial block of country to work with — 382,778 total acres ranging from 1,806 feet up to 7,562 feet in elevation. With 52% public land, hunters have a real base of accessible ground to hunt, though it's worth noting that nearly half the unit is privately held, so understanding land boundaries before heading out is essential. This unit carries zero designated wilderness acreage, meaning access is generally road-based rather than requiring extended pack-in trips, which makes it approachable for hunters without the time or logistics for deep backcountry travel.

Unit 31 has drawn attention from elk hunters searching for accessible public-land opportunity in Idaho, and the numbers back up steady interest. In 2025, 2,966 hunters pursued elk here, with 663 harvested for a 22% unit-wide success rate. The year before, 2024 saw 1,300 hunters take to the field with 328 harvested, a 25% success rate. Both years reflect meaningful hunting pressure and a functional, huntable elk population — this is not a unit where tags go unused or hunters are hunting a ghost herd.

HuntPilot Analysis: Is Unit 31 Worth Applying For?

Unit 31 presents a reasonable case for elk hunters prioritizing access and opportunity over trophy potential. The elevation range and lack of wilderness designation mean this is workable terrain — hunters can cover ground from valley floor sagebrush and foothill terrain up into higher timbered country without needing horses, guides, or multi-day pack trips. At 52% public land, there's a solid base to hunt, though hunters should plan carefully around the private inholdings that make up the other 48% of the unit.

The harvest numbers tell a story of consistent, if not spectacular, success. A 22-25% success rate across 2025 and 2024 is respectable for a public-land elk unit and suggests hunters who put in the scouting and legwork have a legitimate shot at connecting. That said, the jump in hunter numbers from 1,300 in 2024 to nearly 3,000 in 2025 is notable — this unit is seeing increased pressure, which is worth factoring into expectations for solitude and hunt quality.

Trophy-wise, the counties overlapping Unit 31 carry a limited history of trophy-class record entries. This points toward limited trophy potential rather than a unit known for producing exceptional bulls. Hunters chasing a wall-hanger as a primary goal should look elsewhere; hunters looking for a solid, accessible elk hunt with a fair shot at filling a tag should find Unit 31 a reasonable option. This is fundamentally an opportunity-and-access unit, not a trophy destination.

For residents, the low-cost application structure makes Unit 31 an easy unit to put in for as part of a broader Idaho elk strategy, especially given Idaho's lottery-style draw system where every applicant — regardless of history — faces the same odds each year.

How to Apply

Idaho's draw system is a pure lottery — there are no preference points or bonus points to accumulate. Every application is judged independently each year, meaning a first-time applicant has exactly the same odds as someone who has applied for a decade. This makes Unit 31 (and Idaho elk hunting generally) approachable for hunters who don't want to invest years of point-building before drawing a tag.

Nonresident hunters need to budget for the license fee upfront, since Idaho requires hunters to hold a qualifying hunting license before the elk application can even be submitted — this is separate from and in addition to the application fee and eventual tag fee. All told, a nonresident applying for Unit 31 elk should plan for the license fee plus application fee at the time of application, with the tag fee due only if drawn.

For current draw statistics specific to Unit 31, check HuntPilot's Idaho state page at /states/id, which tracks year-to-year figures beyond what's summarized here.

Application dates and fees change every draw cycle. For the current deadlines, fees, and draw odds, see HuntPilot's Idaho page at /states/id.

Access & Terrain

Unit 31 spans a wide elevation gradient — from 1,806 feet at its lowest to 7,562 feet at its highest point — which gives hunters options depending on time of year, weather, and where elk are holding. Lower elevations tend toward valley and foothill terrain, while the upper end of that range moves into higher, likely timbered country typical of southwestern Idaho elk range. With zero wilderness acreage, none of this unit requires wilderness-permit logistics or extended horseback/pack-in access — hunters can generally reach hunting areas via roads and trails without the multi-day approach that wilderness units often demand.

The 52% public land figure means hunters have a workable base, but it also means private property is a real factor across roughly half the unit. Successful hunters here will want to identify public land boundaries carefully before the season, since the checkerboard mix of public and private ground common in this part of Idaho can create access headaches for hunters unfamiliar with the area. Hunters should use mapping tools — including HuntPilot's own public land overlays — to identify exactly where public access starts and stops before committing to a specific drainage or ridge system.

Given the elevation spread and lack of wilderness, Unit 31 is well suited to day-hunting or short-camp strategies rather than extended backcountry expeditions. Hunters willing to get a mile or more off any road, as is common advice across similar southwestern Idaho terrain, will typically find less pressure and more consistent elk sign.

Harvest Success Rates

Unit 31's harvest data shows a consistent, moderate success rate for elk hunters. In 2025, 663 of 2,966 hunters harvested an elk, a 22% success rate. In 2024, that number was slightly higher at 25%, with 328 harvested out of 1,300 hunters. Both years represent a meaningful sample size and indicate that roughly one in four to one in five hunters in this unit are tagging out in a given year — a solid baseline for a public-land, road-accessible elk unit.

The significant increase in hunter numbers between 2024 and 2025 — more than doubling from 1,300 to 2,966 — is worth watching. Increased hunter density can affect elk behavior, pressure animals into less accessible terrain, and generally make the hunt more competitive for tags and elbow room alike. Hunters planning a trip to Unit 31 should factor this pressure trend into scouting and strategy, particularly around opening weekend when hunter numbers are likely highest.

The 2023 data shows only 5 hunters recorded, which is too small a sample to draw any meaningful conclusions from and likely reflects a different or more limited hunt structure that year rather than representative unit-wide activity.

Trophy Quality

Trophy data for Unit 31 points toward limited trophy potential. The counties overlapping this unit have a limited history of trophy-class record entries, which suggests hunters should approach this unit with realistic expectations — this is not a unit with a track record of producing well-known trophy bulls. That doesn't mean mature bulls aren't present, but hunters whose primary objective is a record-book-caliber animal will find better odds of that outcome in units with a deeper trophy history.

For most hunters, Unit 31 is better framed as an opportunity unit: a place to fill a tag, spend time in accessible elk country, and enjoy a fair shot at success based on the harvest data, rather than a unit to target specifically for antler quality.

Frequently Asked Questions

What is the terrain like in Idaho Unit 31? Unit 31 covers a wide elevation range from 1,806 feet to 7,562 feet across 382,778 acres, with no designated wilderness. This means terrain runs from lower valley and foothill country up into higher elevation ground, all generally accessible without the extended pack-in travel required in wilderness-designated units. Hunters should expect a mix of public and private land, with 52% of the unit classified as public.

What is harvest success like in Idaho Unit 31? Recent data shows a 22% unit-wide success rate in 2025 (663 harvested out of 2,966 hunters) and 25% in 2024 (328 harvested out of 1,300 hunters). These figures suggest a consistent, moderate-to-solid success rate for a public-land elk unit, though hunter numbers nearly tripled between 2024 and 2025, which may affect future success rates as pressure increases.

How big are the elk in Unit 31? Trophy record data for the counties overlapping Unit 31 shows a limited history of trophy-class entries, pointing toward limited trophy potential. Hunters can expect a fair chance at harvesting an elk based on the unit's success rates, but this is not a unit with a strong track record of producing trophy-class bulls.

Is Idaho Unit 31 worth applying for? For hunters prioritizing accessible public land, a road-based (non-wilderness) hunting experience, and a reasonable shot at filling a tag, Unit 31 is a solid option — the harvest data shows success rates in the 22-25% range over the last two recorded years. Hunters specifically chasing trophy-class bulls may want to weigh this against units with stronger trophy histories, since Unit 31's overlapping counties show limited trophy record production.

Does Idaho use a preference point system for Unit 31 elk? No. Idaho's draw system is a pure lottery with no preference points or bonus points of any kind. Every application for Unit 31 elk — resident or nonresident — has identical odds each year regardless of how many times a hunter has previously applied. Check HuntPilot's Idaho state page at /states/id for current year-to-year application trends.