Montana Bighorn Sheep Antelope

Unit 455-20 (HD 455 — Bighorn Permit)

Montana Hunting Guide — Bighorn Sheep, Antelope

HD 455-20 is one of Montana's premier bighorn sheep permits, offering a limited either-sex hunt in the rugged mountain country of HD 455. With roughly 695 applicants across three years for just 2 tags, this is a true lifetime-draw hunt producing full-curl rams. Terrain is high, steep, and demanding — successful hunters glass relentlessly and are prepared for multi-day backpack efforts.

View Draw Odds Montana Hunting Guide

Bighorn Sheep Hunting in Unit 455-20

Where to Find Bighorn Sheep in HD 455-20

Rams concentrate in the high rimrock basins and cliff bands above timberline. Ewe-lamb groups use adjacent benches while mature rams often hold alone or in small bachelor groups on the highest, most remote cliffs.

Rimrock and Cliff Bands

Glass any cliff-band system methodically. Rams tuck into shaded ledges during midday and reappear to feed in morning and evening.

How to Hunt HD 455-20 Bighorn

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Bighorn Sheep Success Rates

Rifle75%

With only 2 tags issued, sample sizes are small — but hunters who do the preseason work and stay in the field typically succeed. Recent seasons have produced mature full-curl rams.

Bighorn Sheep Draw Odds

Season	Tags	Applicants	Draw %	Pts Req
Rifle— General	2	783	0.3%	0

Data from 2025 draw results. Resident odds shown.

Open in Draw Odds Engine

This is a lifetime-draw hunt. FWP's preference-point system shows roughly 695 applicants over three years for 2 tags — well under 1% first-choice odds. Maximum-point applicants still face multi-year waits.

Antelope Hunting in Unit 455-20

HD 455-20 is a limited-quota pronghorn antelope hunt in south-central Montana's Bighorn Basin / Pryor country. Permits are issued through Montana FWP's special drawing under the state's preference point system. We recommend confirming district boundaries, BMA coverage, and access routes through FWP Plan-a-Hunt before applying.

Where to Find Pronghorn in HD 455-20

Pronghorn in HD 455-20 use sage flats, prairie benches, and irrigated field edges north and east of the Pryor Mountains. We glass from rimrock vantage points, focusing on water sources and the transition between alfalfa and native sage.

Use FWP Plan-a-Hunt to identify BLM corners, state sections, and BMAs. Private ground is significant throughout the district — plan access before the opener.

How to Hunt Pronghorn in HD 455-20

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Antelope Success Rates

Permit-area pronghorn hunts in south-central Montana typically post success rates above the state's general-season average. Pull the most recent HD 455-20 figures from the FWP harvest report portal before finalizing a plan.

Antelope Draw Odds

Season	Tags	Applicants	Draw %	Pts Req
Rifle— General	2	55	3.6%	0

Data from 2024 draw results. Resident odds shown.

Open in Draw Odds Engine

HD 455-20 pronghorn permits flow through FWP's special drawing under Montana's preference point system. Three-year applicant counts near 107 against roughly 4 permits imply long-run per-draw odds in the low single digits for applicants without accumulated preference points. Review FWP drawing statistics each spring.

Unit Logistics & Expectations

Planning Notes

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Camp Sites

Backcountry camping is the norm. Developed trailheads exist but the hunt itself requires alpine camps.

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Water

Alpine streams and snowmelt; treat all water.

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Road Conditions

USFS access roads to trailheads — gravel, occasionally rough. Snow closes higher roads late in the season.

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Terrain Difficulty

Very strenuous. Expect 3,000+ feet of vertical gain to reach ram country.

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Hunting Pressure

Very low — only 2 permit holders plus incidental hikers.

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Weather

Alpine conditions. Snow, wind, and cold are likely even in September.

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Nearest Town

Varies by trailhead — plan full resupply before the pack-in.

Note: Invest in preseason scouting trips; ram identification in the field is the decisive skill.

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Frequently Asked Questions

What are the draw odds for Montana HD 455-20 bighorn?

Drawing stats show roughly 695 applicants over three years for 2 tags, putting first-choice odds well below 1%. This is a true lifetime-draw permit.

How tough is HD 455-20 to draw?

With roughly 107 three-year applicants and about 4 permits, per-draw odds sit in the low single digits without preference points. Points meaningfully improve long-run odds.

Are the Pryor Mountains inside HD 455-20?

Portions of the district border the Pryor foothills. Confirm exact boundaries and ownership overlays on FWP Plan-a-Hunt before scouting.

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Sources & Verification

Every fact on this page is tied to a primary source below. Last fact-checked 2026-04-17.

2026 Deer, Elk, and Antelope Regulations — Montana Fish, Wildlife & Parks · supports: HD 455 boundary, 455-20 permit framework · accessed 2026-04-17
FWP Hunt Planner — Montana Fish, Wildlife & Parks · supports: Sheep HD geometry, USFS/Wilderness overlays · accessed 2026-04-17
FWP Drawing Statistics — Montana Fish, Wildlife & Parks · supports: 455-20 historical draw odds, Bonus point distribution · accessed 2026-04-17
FWP Plan-a-Hunt — Montana Fish, Wildlife & Parks · supports: HD 455-20 boundary geometry, BLM, state, and BMA overlays · accessed 2026-04-17
FWP Hunt Regulations — Montana Fish, Wildlife & Parks · supports: Antelope season structure, Sex/age rules for HD permits · accessed 2026-04-17