South Platte River, Colorado Hatch Chart — Big Y Fly Co

	Insect	Size	Begin	End
	Midges	20-24	January 1	December 31
	Golden Stone	8-10	May 15	July 31
	BWO	16-20	March 15	May 15
	Trico	18-22	July 15	October 15
	BWO	16-20	August 15	October 31
	PMD	16-18	June 15	August 30
	Hoppers	6-12	July 15	September 25
	Caddis	10-18	May 10	September 30

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