Unit 420 · Big Belt Mountains
About this unit
Big Belt Mountains east of Helena. Limestone range with mixed conifer forest, high open ridgelines, and significant Helena-Lewis and Clark National Forest acreage along the Missouri River breaks.
- Big Belt Mountains
- Helena-Lewis and Clark National Forest
Public lands inside this unit
We're still mapping public-land overlap for this unit. Explore parks in Montana →
Trails near Unit 420
8 found
Washington to Arizona Backcounty Discovery Route Ride
Difficulty: Moderate4716.2 miTrailContinental Divide Trail
Difficulty: Difficult3001.6 miTrailWoodchopper Ridge
Difficulty: Moderate8.0 miTrailMiddle Fork Judith River
Difficulty: Difficult7.5 miTrailBear Gulch
Difficulty: Difficult4.7 miTrailBear Park
Difficulty: Moderate3.1 miTrailArch Coulee
Difficulty: Easy1.4 miTrailMiddle Fk. Judith Atv
Difficulty: Easy1.4 miTrail
Campgrounds near Unit 420
8 found
Judith Station Day Use Area/Bill & Ruth Korell Memorial Campground
Pricing varies — check with the operatorCampground
Judith Guard Station
Pricing varies — check with the operatorCampgroundSawmill Gulch Dispersed
Pricing varies — check with the operatorCampgroundHelena-Lewis and Clark Dispersed Campsite FOR RD 266-YOGO CK -004
Pricing varies — check with the operatorCampgroundHelena-Lewis and Clark Dispersed Campsite FOR RD 266-YOGO CK -0011
Pricing varies — check with the operatorCampgroundHelena-Lewis and Clark Dispersed Campsite MID FORK JD TH RD6537-2
Pricing varies — check with the operatorCampgroundHelena-Lewis and Clark Dispersed Campsite MID FORK JD TH RD 6537-3
Pricing varies — check with the operatorCampgroundHelena-Lewis and Clark Dispersed Campsite MID FORK JD 825-2
Pricing varies — check with the operatorCampground
On the books in Montana
Species inventory is state-level — which units actually hold or permit each species varies. Verify unit-specific rules with the state agency linked above.
Official agency resources
Montana Fish, Wildlife & Parks
- Hunting regulations ↗
https://fwp.mt.gov/hunt/regulations
- Draw / lottery ↗
https://fwp.mt.gov/buyandapply/hunting-licenses/application-drawing-dates
- GMU map ↗
https://fwp.mt.gov/gis/maps/huntPlanner/
- Harvest reporting ↗
https://myfwp.mt.gov/fwpPub/harvestReports
- Hunter education ↗
https://fwp.mt.gov/education/hunter
- Buy a license ↗
https://fwp.mt.gov/buyandapply/hunting-licenses
Authoritative source
Outdoors does not publish hunting regulations directly. For current season dates, bag limits, legal weapons, draw deadlines, and license costs in unit 420, go straight to the issuing agency.
Read the Montana agency pageBoundary verified by Outdoors against the agency source on 10/25/2026.