Today's Read
Yellowstone 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.
Paradise Valley, Montana
Yellowstone River Hatch Report
Fish the softer banks, side channels, and gravel transitions with stoneflies, worms, and baetis nymphs until you see consistent heads.
Bugs & Best Matches
What's active
Fish this
Blue-winged olives, size 18-20, midday to afternoon
Parachute BWO, size 18-20, dry
Midges, size 18-22, sheltered water in the morning
Pat's Rubber Legs, size 6-8, nymph
March Browns, size 12-14, sporadic midday in softer runs
Worm pattern red or pink, size 8-12, nymph
General subsurface
Lightning Bug, size 16-18, nymph; Pheasant Tail, size 16-18, nymph; March Brown Cripple, size 12-14, dry
How Fish Respond To This Hatch
- Yellowstone fish are spread out more than they are on the smaller spring creeks and tailwaters, so the game is finding softer holding water inside a big river. Browns and rainbows sit on current breaks off the main push and slide shallow when baetis start drifting. They are rarely as selective here as they are on the Missouri or Bighorn, but they do want flies near the bottom before the hatch gets going.
- Cover inside bends, seams behind gravel bars, and the slow edge beside heavier center-river current.
Current Conditions
FlowMainstem volume is higher than the trout rivers around it, but side channels and softer inside bends stay very workable in spring.
Water TempWater is still cold enough that feeding windows tighten around the warmest part of the day.
WeatherWind changes the whole river. Stable clouds are better than bright sun or hard gusts.
Rating6/10
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