Fishing Report Updated April 9, 2021

This Yellowstone River fishing report is valid for the middle two weeks of April, 2021.

Shifty weather has made things hard to predict on the Yellowstone of late. One of our guides had a trip last Saturday and did well for an hour, then had fishing shut down on him for the rest of the afternoon as an early surge of snowmelt turned the water a hair too dark. We had to cancel another trip on Tuesday for the same reason.

Once clarity stabilizes, fish big stonefly nymphs and slow-drifted streamers for the most consistent action. BWO nymphs can also work, usually as droppers behind the big flies. Egg patterns work well downstream of tributary creeks where the trout are now spawning. BWO, midge, and March Brown hatches are possible from midday through about 5:00PM, with the best hatches occurring on calm, gray days in the 50s. Look for the largest numbers of rising fish in foamy eddies and slicks. The east side of the river is usually best since it will be slightly warmer.

As the water temperature rises, streamers fished faster and faster start making more and more sense if your goal is a couple big browns rather than numbers. The Mother’s Day Caddis hatch may or may not produce on the Yellowstone. Pupae will start working soon. The hatch itself usually starts around May 5 unless it’s blown out by the early part of the spring runoff.

Yellowstone River Fishing Report – Relevant Links