St. Vrain Creek River Report
1-21-2026
Flows continue to be excellent on the Vrain for mid January, still being above average. However, with the nicer weather, and decent fishing, you will likely encounter some other anglers. Typically, most fish have been feeding sub-surface, but on nicer days the fish have been keyed in on small emergers, so keep a eye peeled for what the fish are doing. With the cooler water, fish in areas with sun to start, especially in the AM. Of note, is that with the weather changes, fish can be very moody, and will take their time, so spend a bit of extra time at each spot. Right now, below Button Rock, and in Lyons will be your best bet for ice free fishing, especilly after the cold front moving in tomorrow evening. Hatches continue to be midges.
Please note that we will be updating the River Reports once a week from here on out, typically on Wednesdays.
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For Dries, use a Hi Viz Midge, Griffith's Gnat, Purple Haze, Morgan's Midge, Parachute Adams, High Vis No See Em Midge, Mole Fly, and a Chubby Chernobyl.
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For nymphs, use a RS-2, Zebra Midge, SOS Nymh, Poison Tung, Juju Baetis, Tung TNT, Barr's Pure Midge, AR's Perdigon, EZ Egg, Thin Mint, Jigged Leech, Tung Stud, and Tail Water Tiny.
Guide Rating
4/5
Weather Experienced
- Temperature: Mid 40's
- Wind Conditions: Light breeze
- Precipitation: None
Water Observations
- Water Temperature: Upper 30's (Lyons)
- Flow Level: 22.30 CFS
- Water Clarity: Near crystal clear
Fly Fishing the St. Vrain
The creek is full of opportunistic fish that are eager to take a dry fly, so take advantage of the great caddis, blue wing olive and terrestrial fishing. The midges that call the St. Vrain home are active all year and are always a safe bet come the colder months of the year. This is a great chance to get out and test some of those midge patterns that you have been drooling over all winter. The Fishing in the town of Lyons can be fantastic.