Arch Lake Fishing Report

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Last Updated: December 4, 2025

Arch Lake is an excellent fishing destination in Montana, located in the Flathead National Forest.


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Summary

Anglers can expect to catch a variety of fish species, including Westslope Cutthroat Trout, Rainbow Trout, and Bull Trout. The lake is also surrounded by scenic hiking trails, making it a great place to enjoy outdoor activities. Fishing tips include using dry flies and small streamers, and fishing early in the morning or late in the evening. The best time to visit is from June to September, with average temperatures ranging from the mid-60s to low 80s Fahrenheit.

       

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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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