Montana Bighorn Sheep

Unit 423-20

Montana Hunting Guide — Bighorn Sheep

Bighorn sheep hunting district 423-20 is a limited-permit sheep district in west-central Montana administered by Montana Fish, Wildlife & Parks (FWP). Permits are issued through FWP's once-in-a-lifetime sheep drawing and are among the most coveted tags in the state. We recommend confirming the current permit code, quota, and season dates in FWP regulations before applying.

View Draw Odds Montana Hunting Guide

Bighorn Sheep Hunting in Unit 423-20

Where to Find Bighorn Sheep in HD 423-20

Bighorn rams in HD 423-20 use rocky escape terrain, rim-and-talus complexes, and south-facing grass slopes. We recommend summer and early-fall scouting from public-access glassing points to inventory rams before the opener.

Focus on broken rimrock, benches above cliff bands, and mineral-lick corridors. Rams often bed mid-day in shaded rock features and feed at first and last light on adjacent grass faces.

How to Hunt Bighorn Sheep in HD 423-20

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Bighorn Sheep Success Rates

Rifle75%

Montana sheep hunter success historically runs very high because permits are capped and hunters commit substantial effort. Confirm HD 423-20's current-year success in FWP's harvest report each spring.

Bighorn Sheep Draw Odds

Season	Tags	Applicants	Draw %	Pts Req
Rifle— General	2	344	0.6%	0

Data from 2025 draw results. Resident odds shown.

Open in Draw Odds Engine

Bighorn permits in HD 423-20 are drawn through FWP's once-in-a-lifetime sheep drawing using a bonus point system. With ~243 applicants and two tags over the last three years, draw odds are in the fraction-of-a-percent range even with bonus points. Plan on a decade-plus point build.

Unit Logistics & Expectations

Planning Notes

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Road Conditions

Paved highway to gateway areas, then gravel and USFS two-track. 4WD strongly recommended for upper access. Early snow closes higher roads.

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Hunting Pressure

Minimal during the season. Scouting pressure by other applicants and outfitters is common in summer.

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Weather

Sheep seasons span warm September weather through cold late-fall conditions with snow potential. Pack layered systems.

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Permit Notes

All licenses are issued through FWP's sheep special drawing. Confirm the current permit code and apply before deadlines.

Note: Consider hiring a local guide for the scouting phase — ground intel is invaluable for a once-in-a-lifetime tag.

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Frequently Asked Questions

How do I get a bighorn sheep permit for Montana HD 423-20?

Sheep permits in HD 423-20 are issued through Montana Fish, Wildlife & Parks' once-in-a-lifetime special drawing. Applicants build bonus points each unsuccessful year.

What is a legal ram in Montana HD 423-20?

Montana's legal-ram definition is published annually in FWP's moose, sheep, and goat regulations. Always confirm the current-year horn criteria before your hunt.

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Sources & Verification

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

FWP Plan-a-Hunt — Montana Fish, Wildlife & Parks · supports: Sheep hunting district boundary for HD 423-20, Public-land overlays for planning · accessed 2026-04-17
FWP Moose, Sheep & Goat Regulations — Montana Fish, Wildlife & Parks · supports: Sheep permit structure and legal-ram definition, HD-specific seasons and weapon rules · accessed 2026-04-17
FWP Drawing Statistics — Montana Fish, Wildlife & Parks · supports: Historical sheep draw odds for HD 423-20, Applicant and quota counts · accessed 2026-04-17