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MONTH-BY-MONTH GUIDE

December fishing on the Bighorn.

Pick a safe weather window and work the slower water.

Before your trip, compare this seasonal advice with the latest flow and water temperature.

SEASONAL GUIDE

What to expect in December

December fishing starts with suitable weather and safe access. Keep the rig simple and take your time in slower water. Midges, sowbugs and scuds are useful starting points.

Cold water and short days can limit feeding to a brief window. Check ice, snow and ramp conditions separately from the flow reading.

01

What usually hatches

  • Midges
  • Occasional blue-winged olives
02

How to fish it

  • Take your time in slower water where you can control the drift
  • Try a small midge behind a more visible lead fly
  • Swing or slowly retrieve a small streamer through deep, slow water
03

How to rig

Begin 7–9 feet deep with modest shot and 4X–5X tippet. Make small adjustments and avoid repeatedly disturbing the run.

STARTING FLY BOX

Carry these patterns.

Sizes are starting points. Match the insects and water in front of you.

Sowbug #16–20Ray Charles #16–20Zebra midge #18–22San Juan worm #10–14Scud #16–18Small sculpin #6–10

PACKING LIST

What to bring

  • Full winter layers
  • Spare dry gloves
  • Traction
  • Wading staff
  • Emergency dry clothing
KEEP IN MIND

Before you head out

Even a familiar float can become unsafe when ramps ice over or ice builds along the banks or riverbed.

Decide whether to go based on access, weather and ice. Be willing to change the plan.

Ask the Bighorn assistant

HELP US IMPROVE

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