South Mesa Lake Fishing Report

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Last Updated: December 4, 2025

South Mesa Lake is a small, man-made reservoir located just outside of Boulder, Colorado.


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Summary

The lake is stocked with rainbow trout, brown trout, and channel catfish, making it a popular spot for both fly and bait fishing. Nearby activities include hiking and mountain biking in the surrounding foothills, as well as rock climbing and bouldering in the nearby Flatirons. Fishing tips include using lightweight spinning gear or a fly rod with small spinners or nymphs. The best time to visit is from April to October, with temperatures ranging from the mid-50s to mid-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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