Rio San Antonio Fishing Report

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Last Updated: December 4, 2025

The Rio San Antonio fishing area in Colorado is known for its excellent trout fishing.


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Summary

The river is home to both rainbow and brown trout, and anglers can use a variety of methods including fly fishing, spin casting, and bait fishing. Nearby activities include hiking, camping, and wildlife watching. The best time of year to visit is in the summer months when temperatures range from the mid-70s to low 80s Fahrenheit. Fishing in the morning or evening when the water is cooler is recommended, and using small nymphs and dry flies can be effective.

       

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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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