Today's Read
South Platte River is keyed to the bugs that are active in the current light and water conditions. These are the insects that matter right now and the windows when they matter most.
Deckers, Colorado
South Platte River Hatch Report
Fish the slow seams with a shallow, technical nymph rig first, then adjust toward emergers or a small dry only if you see steady noses.
Bugs & Best Matches
What's active
Fish this
Midges, size 20-24, all day with strongest windows early and late
Top Secret Midge, size 20-24, nymph; RS2 olive or gray, size 20-22, emerger
Blue-winged olives, size 18-22, late morning through afternoon
BWO Barr Emerger, size 18-20, nymph
Caddis prep and pupa activity, size 14-16, sporadic warm afternoons
Chocolate Foam Wing Emerger, size 20-22, emerger
General subsurface
Parachute Adams, size 20-22, dry; Black Beauty, size 20-24, nymph
How Fish Respond To This Hatch
- South Platte trout near Deckers feed often but slide into technical behavior fast when flows are clear and stable. Expect fish to hold in the slower seam off the main tongue, on inside shelves, and in buckets where current drops just enough to let them inspect food. They will eat midges and small mayflies all day, but the more visible surface activity usually stays concentrated in specific slicks rather than spreading river-wide.
- Keep the rig shallow enough to drift clean through the softer seam instead of hanging in every slot.
Current Conditions
FlowModerate spring flows usually keep the Deckers water wadeable while still giving fish cover.
Water TempLow-fifties water is enough for consistent feeding, but not enough to make fish reckless.
WeatherOvercast gives you more flexibility. Bright afternoons usually make the river more technical.
Rating7/10
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