Ovando to Bonner, Montana

Blackfoot River Hatch Report

Updated Apr 24, 2026, 7:45 AM MDT

Expect a nymph-and-streamer day more than a hatch day unless you catch a softer weather window.

Current Conditions
  • Flow: The Blackfoot can change quickly in spring, so clarity and side-channel volume matter as much as raw flow.
  • Water Temperature: Cold spring water usually keeps fish near softer edges and deeper buckets until the afternoon.
  • Weather: A stable, cool day helps. Sudden heat pushes the river toward runoff behavior fast.
  • Overall Rating: 5/10
Today's Read

Blackfoot 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.

Current Hatch Report
  • Blue-winged olives, size 18-20, sporadic midday
  • March Browns, size 12-14, warmer afternoons
  • Midges, size 18-22, slower water in the morning
Flies To Match The Hatch
  • Pat's Rubber Legs, size 6-8, nymph
  • Hare's Ear, size 14-16, nymph
  • Prince Nymph, size 12-16, nymph
  • Zirdle Bug olive or black, size 6-8, streamer
  • Parachute Adams, size 14-18, dry
How Fish Respond To This Hatch
  • Blackfoot trout in late April are usually opportunistic rather than selective. Fish hold close to soft banks, side seams, and woody structure where current breaks give them a stable lie. If the river is clear enough, nymphing remains the highest-percentage play, but a stripped streamer can move fish along undercut banks and darker slots.
  • Start by checking clarity. If you cannot get away with a standard nymph rig, fish bigger profiles or streamers with slower strips.