Mayflies
Blue Winged Olive - Baetis tricaudatus - March, April
Blue Winged Olive - Diphetor hageni - September, October
Pale Morning Dun - Ephemerella inermis - August, September
Western Green Drake - Drunella grandis - July, August
Speckle Wing Quill Callibaetis coloradensis - June, July
Trico - Tricorythodes minutus - September, October
Red Quill - Servatella tibialis - September, October
Stoneflies
Giant Salmon Fly - Pteronarcys californica - June, July
Golden Stonefly - Hesperoperla pacifica - June, July
Brown Stoneflies - Nemouridae(9 species) - June, July
Little Yellow Stonefly - Isoperla (9 species) - June, July, August
Craneflies
Cranefly - Tipulidae - July, August
Midges
Midges - Chironomidae - All year; Heavy in winter
Caddis (Major hatches)
Caddis (Sedge) - Brachycentrus occidentalis - April, May
Caddis - Brachycentrus americanus - July, August
Caddis - Hydropsyche occidentalis - April- October
Caddis - Hydropsyche oslari - April-October
Caddis - Ceratopsyche cockerelli - Aug, October
Caddis - Cheumalopsyche pettiti - May-September
Caddis - Cheumalopsyche lasia - September
Caddis - Glossosoma montana - September
Caddis - Micrasema bactro - August, September
Caddis - Helicopshche borealis - June, July
Caddis - Rhyacophila brunnea - April, May
Caddis - Rhyacophila coloradensis - April-September
Caddis - Oecentis disjuncta - June
Caddis - Arctopsyche grandis - June, July
Caddis - Hesperophaylax designatus - July
