Unit 21 Elk Hunting, Idaho
Idaho hunting unit · Salmon Elk Zone · 509 sq mi
General season — resident tags over the counter
Residents buy general elk tags over the counter — no draw, no points. General elk is sold by zone: Unit 21 is in the Salmon Elk Zone, whose A and B tags carry different seasons. Nonresident general tags are allocated by random draw. The zone's B tag is capped: a limited number, sold first-come, first-served.
What hunting Unit 21 is like
Unit 21 sits deep in the Salmon-Challis National Forest, with roughly a fifth of the unit inside the Frank Church - River of No Return Wilderness where motorized access is closed. Elevations run from around 2,900 feet up to 9,200 feet, and the country in between is steep and broken, with slopes averaging near 24 degrees and less than a tenth of the unit offering gentle ground. Cover across all elevation bands is dominated by sagebrush and conifer timber, with only a modest share of grass and meadow mixed in, so hunters spend a lot of time working timbered slopes and sage benches on foot. This is a unit that rewards hunters willing to get well off any road and cover ground on foot.
Public access is about as good as Idaho elk hunting gets on paper: National Forest land covers roughly 99 percent of Unit 21, with only a sliver in private hands that requires written permission. That said, wilderness terrain and steep slopes mean the ground being open does not make it easy to reach or hunt. The Moose fire burned about 7,300 acres on the unit's southeast side, now two to four years past the burn, and the Cove Creek fire burned about 5,400 acres on the southwest side, now five to eight years out — both worth building into a plan, and hunters should check for current fire closures before heading in.
General elk tags here are sold through the Salmon Elk Zone, which also covers Units 21A, 28 and 36B, and a hunter picks either the zone's A tag or its B tag, each with its own season and weapon rules that apply within Unit 21.
General-season elk (2026)
General elk tags are sold by zone. Unit 21 is in the Salmon Elk Zone (Units 21, 21A, 28 and 36B); a hunter chooses its A tag or its B tag, and each carries its own seasons. The windows below are the ones valid in Unit 21. Residents buy the tag over the counter; nonresident general tags are allocated by random draw.
| Season | Dates | Legal elk | Rut phase |
|---|---|---|---|
| A tag · Archery Valid area: Units 21, 21A, 36B | August 30 – September 30 | Any elk | Pre-Rut Transition, Rut Onset, Primary Rut |
| B tag · Any weapon Valid area: Units 21, 21A, 28 and 36B | October 15 – November 8 | Antlered only | Late Rut / Early Post-Rut, Post-Rut Recovery, Migration Transition |
A tag · Archery · August 30 – September 30
Archery season opens as bulls are finishing the Pre-Rut Transition and moving through Rut Onset into the Primary Rut, so calling and rut sign both come into play as September goes on. Early on, bulls are still shedding velvet and holding close to the same ground they used through summer, making sitting water or glassing timbered slopes and sage benches for a spot-and-stalk a solid approach in Unit 21's steep, broken terrain. The Moose fire area, now two to four years past the burn, is worth a look during this window since open ground there makes glassing easier and the fresh feed can pull elk out to graze at first and last light. The A tag is valid for archery equipment only, covers Units 21, 21A and 36B, and allows any elk.
B tag · Any weapon · October 15 – November 8
By the time the B tag season opens, elk have moved past the rut and into the Late Rut / Early Post-Rut and Post-Rut Recovery phases, with Migration Transition setting in by November as animals start shifting off summer range. Hunting shifts from calling to covering ground and reading sign, since bulls are no longer keyed in on breeding activity. The Cove Creek fire area, now five to eight years past the burn, has grown thick with brush and standing deadfall, which can hide animals well but also slows travel through it. Snowfall builds through the season, lighter in October and heavier by November, which can push elk toward lower ground and make travel tougher in Unit 21's steep country; the B tag allows any weapon, is capped with a limited number of tags sold first-come, first-served, covers Units 21, 21A, 28 and 36B, and is restricted to antlered elk only.
Terrain & elevation
- Elevation
- 2,900–9,200 ft, typically around 6,300 ft
- Slope breakdown
- 8% gentle · 42% moderate · 47% steep · 4% rugged
- Ground you can count on
- ~502 sq mi
- National forests
- Salmon-Challis National Forest
- Designated wilderness
- Frank Church - River of No Return Wilderness (22%) — closed to motorized vehicles
Habitat & cover
What grows here, by elevation. Each band adds to 100% on its own — these are shares of that band, not of the unit.
Lower elevations
- Sagebrush54%
- Conifer34%
- Grass and meadow10%
- Other cover2%
Mid elevations
- Sagebrush59%
- Conifer36%
- Grass and meadow5%
Higher elevations
- Sagebrush54%
- Conifer34%
- Grass and meadow11%
Cover classes from the USGS National Land Cover Database. “Other cover” is the remainder — bare ground, water, agriculture and developed land.
Recent fires
Wildfires in the last several seasons that burned a meaningful share of Unit 21. Fire perimeters show where a fire burned, not how hot — and closures change through the year, so check current fire closures and restrictions before you go.
- Moose fire, 2022 — about 7,300 acres in the unit (2%), mostly on its southeast side.
- Cove Creek fire, 2019 — about 5,400 acres in the unit (2%), mostly on its southwest side.
Fire perimeters from the National Interagency Fire Center.
Land & access
About 99% of Unit 21 is public land a hunter can generally count on — National Forest.
- National Forest99%
- Private1%
Fall weather
- August — highs around 73°F, lows around 48°F
- September — highs around 62°F, lows around 40°F, about 0.1 in of snowfall
- October — highs around 47°F, lows around 30°F, about 1.8 in of snowfall
- November — highs around 33°F, lows around 21°F, about 12.8 in of snowfall
- December — highs around 26°F, lows around 14°F, about 25.8 in of snowfall
Unit 21 elk hunting FAQ
Can a resident buy an elk tag for Unit 21 over the counter?
Yes. Residents can buy a general elk tag for the Salmon Elk Zone, which covers Unit 21, over the counter with no draw and no application required.
How do nonresidents get a general elk tag for Unit 21?
Nonresidents go through a random draw, and when applying they choose a specific tag — either the Salmon Elk Zone's A tag or its B tag — rather than drawing a general tag and picking a zone afterward. The tag choice is locked in at the time of application.
Which elk zone and tags cover Unit 21?
Unit 21 falls in the Salmon Elk Zone along with Units 21A, 28 and 36B. The zone offers an A tag and a B tag with different seasons and weapons, and a hunter selects one of the two.
Does either general season in Unit 21 fall during the rut?
The A tag archery season, running August 30 through September 30, spans the Rut Onset and Primary Rut phases and is the rut-season option. The B tag any-weapon season, October 15 through November 8, falls after the rut during the Late Rut, Post-Rut Recovery and Migration Transition phases.
How much of Unit 21 is public land a hunter can count on?
About 99 percent of the unit, roughly 502 square miles, is National Forest land generally open to public hunting. Only a small private share, about 1.4 percent, exists and requires written permission to access.
Data sources & methodology
- Idaho Fish and Game — Idaho Big Game 2026 Seasons & Rules — general and controlled season dates, legal animals and the brochure's unit notes
- Idaho Fish and Game — Idaho Hunt Planner — unit boundaries, the national forests and wilderness areas in each unit, and controlled-hunt drawing results behind the odds bands
- Idaho Fish and Game — 2026 Nonresident General Tags and Tags Allocated to Outfitters — which general elk zone tags are capped
- USGS / MRLC — National Land Cover Database — habitat and cover classes by elevation band
- USGS PAD-US — Protected Areas Database of the United States — land ownership and access
- Daymet daily climate, 1991–2020 (Oak Ridge National Laboratory) — fall weather
- National Interagency Fire Center — wildfire perimeters — recent fires, their size and where they burned
Controlled-hunt draw difficulty is a qualitative band from resident first-choice results, not published odds. Land shares are separate, non-overlapping categories. Confirm current dates and rules in the Idaho Big Game Seasons & Rules brochure before you hunt. Unit data last updated September 29, 2026.