Flagstaff Reservoir Fishing Report

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Last Updated: December 4, 2025

The Flagstaff Reservoir is a popular fishing spot in Montana, USA.


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Summary

Anglers can expect to catch rainbow trout, brown trout, and cutthroat trout. Nearby activities include hiking, camping, and birdwatching. Fishing tips include using small lures or flies and fishing in the early morning or late evening when the fish are most active. The best time to visit is from May to September with average temperatures ranging from 40°F to 80°F depending on the month.

       

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Angling Safety Guidelines

Know the Regulations
Check local fishing rules, seasons, size limits, and license requirements to ensure legal and sustainable angling.
Handle Fish Responsibly
Use wet hands, minimize air exposure, and release fish gently to improve survival rates when practicing catch-and-release.
Choose the Right Gear
Match your rod, line, and tackle to the species and conditions to increase success and reduce unnecessary harm to fish.
Respect the Waterway
Avoid disturbing habitat, prevent bank erosion, and keep a safe distance from spawning areas to protect ecosystems.
Keep It Clean
Pack out all line, hooks, bait containers, and trash—discarded gear can injure wildlife and degrade waterways.

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