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
Continental Divide Trail
3001.6 miTrailDifficulty: DifficultWoodchopper Ridge
8.0 miTrailDifficulty: ModerateMiddle Fork Judith River
7.5 miTrailDifficulty: DifficultWashington to Arizona Backcounty Discovery Route Ride
4.7 miTrailDifficulty: ModerateBear Gulch
4.7 miTrailDifficulty: DifficultBear Park
3.1 miTrailDifficulty: ModerateArch Coulee
1.4 miTrailDifficulty: EasyMiddle Fk. Judith Atv
1.4 miTrailDifficulty: Easy
Campgrounds near Unit 420
2 found
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 09/06/2026.