Hatch Chart

Southwest Montana hatch chart

Our hatch chart is intended to help you become more familiar with major seasonal hatches that take place on our waters.  While the hatch dates rely heavily on seasonal temperatures and water conditions, we’ve found that these dates are historically when these bugs “pop” on their respective river.

Beaverhead and Ruby Rivers

March 20 – May 10……………………………………….Blue Wing Olives
May 5 – September 20…………………………………………………Caddis
June 20 – August 5……………………………………Pale Morning Duns
July 20 – September 20…………………………………………..Craneflies
June 20 – August 20………………………………….Little Yellow Sally’s
August 5 – September 5…………………………………………………Tricos
September 10 – November 10…………………………Blue Wing Olives

Big Hole River

March 20 – May 20……………………………………….Blue Wing Olives
April 1 – May 15……………………………………………………Skwallas
May 10 – July 25………………………………………………………….Caddis
June 5 – June 30……………………………Salmonflies/Golden Stones
June 20 – July 20………………………………………Pale Morning Duns
June 20 – July 20………………………………………Little Yellow Sally’s
August 1 – August 20………………………………………..Spruce Moth
August 1 – September 10………………………………………………..Tricos

Madison River

March 20 – May 20……………………………………….Blue Wing Olives
May 10 – August 15………………………………………………………Caddis
June 15 – July 15…………………………….Salmonflies/Golden Stones
July 1 – August 10………………………………………Little Yellow Sally’s
July 1 – July 25…………………………………………..Pale Morning Duns
September 5 – October 25……………………….…….Blue Wing Olives

Poindexter Slough (Spring Creek)

March 20 – May 10……………………………………….Blue Wing Olives
May 5 – August 15………………………………………………………..Caddis
June 20 – August 5…………………………………….Pale Morning Duns
September 10 – November 10…………………………Blue Wing Olives
July 15 – August 5…………………….…..………………………..Craneflies

Clark Canyon

May 1 – November 30………………………………………………….Midges
May 15 – October 30……………………………………………….Callibaetis
June 25 – August 10…………………………………………….Damsel Flies