Fly Hatch Chart for the Yellowstone River, Wyoming

The Hatch

Try These Flies

Time of Year

Attractor Trout Flies

Learn About Attractor Trout Flies

Attractor Nymphs
Attractor Dry Flies

June-October

Baetis or Blue-winged Olive

Learn About The Baetis Mayfly Hatch

Baetis Nymphs and Emergers
Baetis Dry Flies

July-October

Caddis Flies

Learn About The Caddis Hatch

Caddis Larva and Pupa

Caddis Dry Flies

June-September

Callibaetis Mayfly Patterns

Nymphs and Emergers:

Dry Flies:

August

Golden Stonefly Trout Fly Patterns

Learn More about the Golden Stonefly Hatch

July-October

Grey Drake Mayfly

July-September

Green Drake Mayfly

July-August

Little Western Green Drakes

Nymphs (Size #18-22):

Flav Emerger Patterns (Size #18-22):

Dry Flies (Size #18-22):

July-August

Little Yellow Stonefly or Yellow Sally

Learn About The Little Yellow Stonefly Hatch

Stonefly Nymphs
Yellow Sally Adult Stoneflies

June-July

Midges or Chironomids

Learn About The Midge or Chironomid Hatch

Midge Larva
Midge Pupa or Emergers
Midge Adult Dry Flies

All Year

Pale Morning Dun or PMD (Ephemerella)

Learn About The PMD Hatch

PMD Nymphs and Emergers
Mayfly Emergers
PMD Dun & Spinner

July-September

Salmonfly, Skwala and Dark Stonefly

Learn More About The Stonefly Hatch

July

Streamers

Wooly Buggers

April-May, September-November

Terrestrials

July-September

Trico Mayfly

Learn About The Trico Mayfly Hatch

August-October