Beaverhead River in February

Written By Wes Peterson

Leave your boat at home! winter flows makes this a great wade fishing opportunity.

February on the Beaverhead River is not about numbers of flies — it’s about precision. This is true winter tailwater fishing: cold, clear water, spooky trout, and fish feeding almost exclusively subsurface. The upside? Some of the largest trout of the year are caught right now if you’re willing to fish small, slow, and deep.

If you’re coming to the Beaverhead in February, leave the big boxes at home. These are the must-have flies that consistently produce.

Midges: The Bread and Butter of February

Trusted Zebra Midge #18-20

Midges dominate the Beaverhead in winter. Trout feed on them all day long, especially during low-light mornings and calm afternoons.

Top Midge Patterns

  • Zebra Midge – black, red, olive (#18–20)

  • Rainbow Warrior - pearl (#18)

Fish these deep under an indicator or as the dropper behind a slightly heavier nymph. Smaller is better —

Guide Tip: If you think you’re fishing small enough… go one size smaller.

BWO Splitcase #20

Small Mayfly Nymphs (Subtle Is Key)

While there are no major dry-fly hatches in February, trout are still eating immature mayfly nymphs. Slim profiles and natural colors are crucial.

Go-To February Nymphs

  • Split Case BWO Nymph (#20)

  • Sunkist BWO Nymph (#18)

  • Perdigon-style nymphs (olive, black)

These flies shine when paired with a midge in a two-fly rig, ticking bottom without snagging.

Pink Soft Hackle Sow #18

Sowbugs & Scuds: Year-Round Staples

The Beaverhead is famous for its abundant aquatic life, and sowbugs and scuds are available year-round. In winter, trout rely on them heavily because they don’t disappear when water temps drop.

Must-Have Patterns

  • Pink or Tan Sowbug

  • Ray Charles

  • Pink Soft Hackle

Fish these in slower seams and deeper runs where fish stack up during winter.

Streamers: Big Fish, Low Effort

February isn’t a streamer free-for-all, but on warmer afternoons or overcast days, slow-swung or dead-drifted streamers can move serious trout.

Winter Streamer Picks

  • Thin-profile Sculpins

  • Small Woolly Buggers (olive, black)

  • Sparkle Minnow (downsized)

Think subtle movement — short strips or let the fly swing naturally through deeper buckets.

February Fly Box Checklist

Midg es

  • Zebra Midge (#20)

Nymphs

  • Split Case BWO (#18–20)

  • Sowbugs & Scuds (#16–18)

Streamers

  • Small sculpins

  • Woolly Buggers (olive/black)

Final Thoughts

February on the Beaverhead isn’t flashy — but it’s incredibly rewarding. Fewer anglers, hungry trout, and technical fishing that forces you to slow down and fish well. Bring the right flies, fish them patiently, and you’ll be rewarded with some of the most satisfying trout fishing Montana has to offer.

See you on the river.

Wes Peterson
Next

SPRING PACKAGE