Montana Fishing Size Limits
Legal minimum sizes and daily limits for fishing in Montana. Updated for 2026.
Montana Fish Size Limits
Complete guide to legal fish sizes in Montana. Find minimum sizes, slot limits, and daily limits for all regulated species. Updated for 2026.
Fish Species
3
With Size Limits
1
No Size Limit
2
Updated
2026
Fish Size Limits
1 species with minimum size requirements in Montana
| Species | Size Limit | Daily Limit | Notes |
|---|---|---|---|
| | Varies by reservoir | 10 | - |
No Statewide Size Limit
Species with daily limits only (no minimum size)
| Species | Daily Limit | Notes |
|---|---|---|
| | 5 | Varies by water |
| | 5 | Blue-ribbon streams |
- Regulated species
- Rainbow Trout, Brown Trout, Walleye
- Minimum lengths
- Walleye Varies by reservoir
- Daily-limit only
- Rainbow Trout, Brown Trout
- Issuing agency
- Montana Fish, Wildlife & Parks
Need the regulatory background? How fish size limits work covers minimums, slots, and proper measurement.
Montana Fishing Regulations Overview
State fish and wildlife agency information
- Fish Species
- 3 species with regulations
- Species with Size Limits
-
- Walleye
- Fish & Wildlife Agency
- Montana Fish, Wildlife & Parks
This information is for reference only. Always verify regulations with your state wildlife agency before hunting or fishing.
Last verified: January 2026
Montana Fishing Size Limits FAQ
Common questions about fish size regulations in Montana
What is the trout size limit in Montana?
Montana trout regulations: varies by water. Daily limit is 5. Varies by water
Which fish have size limits in Montana?
Montana enforces size limits on 1 species including: Walleye (Varies by reservoir). Always verify current regulations before fishing.
Which Montana fish have daily limits but no size minimum?
2 species are managed in Montana by daily creel limit only: Rainbow Trout (5), Brown Trout (5).
Other States
View fishing size limits for more states
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