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Firehole River, Wyoming Hatch Chart

Insect Size Begin End
Midge
18-22 May 15th October 31st
Sculpin 2-8 May 15th October 31st
Caddis 2-10 May 15th October 31st
Baitfish 2-10 May 15th October 31st
BWO/Baetis 16-24 May 15th October 31st
Flav
14-16 June 1st June 30th
PMD
16-20 June 1st July 15th
Salmonfly 2-8 June 1st July 15th
Golden Stone 6-10 June 1st July 15th
Yellow Sally 14-16 June 15th July 31st
Hopper
10-14 June 15th October 15th
Ant
16-18 June 15th October 15th
Beetle
14-18 June 15th October 15th
Mahogany Dun 14-18 June 1st July 31st

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