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Figuring our Fishing

Hatches

Lakes | Rivers

This emergence index is based on 30 years of monitoring Northern Sierra waters. Cool weather may slightly delay the hatch and warm weather can slightly advance it. Combine this index with flow information to plan your trip. Click into resources to fine-tune your experience and go to flies for more information on pattern selection.

Truckee River flows (optimum 200-400 cfs) Little Truckee flows (below Stampede) (optimum 150 cfs)

N.Fork Yuba flows (optimum 300) EF Carson Flows (optimum 200 cfs)

***	**	*
Main Hatches	Minor Hatches	Sporadic Hatches

Truckee Area Lakes

PROPER NAME	COMMON NAME	SUB ADULT	ADULT	SIZE	MAY	JUN	JUL	AUG	SEP	OCT
Callibaetis	Speckled Dun Mayfly	Pheasant Tail	BiVisible Dun Grey Cripple	12-18	**	***	**	*	*	**
Siphlonurus	Grey Drake MayFly	Birds Nest	BiVisible Dun Grey Cripple	10-12	*	***	*	*	*	*
Caenis	Snowflake Dun Mayfly	Pheasant Tail	Sparkle Dun	20-22	*	**	***	**	*
Tricorythodes	Trico Mayfly	Pheasant Tail	BiVisible Dun	20-22	*	**	***	**	*	*
Phryganea	Motor Boat Caddis	Teichert Caddis	E/C Caddis	10		**	***	***	*
Mystacides	Black Dancer Caddisfly	Pheasant Tail Birds Nest	E/C Caddis	14-16		**	***	*
Zygoptera	Damselfly	Marabou Damsel	Braided Butt Damsel	8-14	**	***	***	**	**	*
Anisoptera	Dragonfly	Geirach Dragon		6-10	**	***	***	***	**
Chironomus	Blood Midge	Brassie	Martis Midge	14	***	***	**	*	*	**
Gammarus	Scud	Birds Nest	Birds Nest	10-16		*	**	***	***	**
Various	Snail	Floating snail	Floating snail	6-16		*	**	***	***	***

 

Truckee Area Rivers and Streams

PROPER NAME	COMMON NAME	SUB ADULT	ADULT	SIZE	MAY	JUN	JUL	AUG	SEP	OCT
Ameletus	Slate Wing Dun Mayfly	Birds Nest Pheasant Tail	Brown Cripple	10-12	**
Heptagenia	Blue Wing Olive Mayfly	Soft Hackle Birds Nest	BiVisible Dun Cripple	12-16	**	*
Rhithrogenia	March Brown Mayfly	Soft Hackle Birds Nest	BiVisible Dun Cripple	12-14	**
Epeorus	Sulfer Mayfly	Pheasant Tail GR Hares Ear	BiVisible Dun Humpy	14-18		***	**
Cinygmula/Cinygma	Red Quill Mayfly	Birds Nest GR Hares Ear	BiVisible Dun Humpy	16/ 18	**	**	*
Baetis	Blue Winged Olive Mayfly	Pheasant Tail GR Hares Ear	BiVisible Dun	18-24	***	*	*	*	*	***
Paraleptophlebia	Mahogany Dun Mayfly	Pheasant Tail GR Hares Ear	BiVisible Dun Cripple	14-18	**	**	*
E. Tibialis	Creamy Orange Mayfly	Birds Nest Pheasant Tail GR Hares Ear	BiVisible Dun Cripple Humpy	14-16	**	***	**	*
E. Flavilinea	Flav MayFly	Birds Nest GR Hares Ear	Green Cripple Humpy	12-14		**	**
E. Infrequens E. Inermis	Pale Morning Dun Mayfly	Birds Nest Pheasant Tail GR Hares Ear	BiVisible Dun Tan Cripple Humpy	14-16 18	**	***	***	*
Drunella Grandis	Green Drake Mayfly	Birds Nest GR Hares Ear	BiVisible Dun Humpy	10	*	***	*
Rhyacophila	Green Sedge Caddisfly	Rockworm Sparkle Caddis	E/C Caddis Z Wing Caddis	12-18	*	***	***	**	*
Hydropsyche	Spotted Sedge Caddisfly	Rockworm Sparkle Caddis	E/C Caddis Z Wing Caddis	12-18	*	***	***	**	*
Glossosoma	Saddle Case Caddisfly	Rockworm Birds Nest	Bird Nest E/C Caddis	16-18	*	***	***	*
Brachycentrus	Grannom Caddisfly	Pheasant Tail	Birds Nest E/C Caddis	10-18		**	**	**
Dicosmoecus	October Caddis	Red Squirrel	Madam X Stimulator	6-8					**	***
Gammarus	Scud	Birds Nest	Birds Nest	10-16		*	**	***	***	**
Calineuria	Golden Stonefly	Birds Nest	Madam X Stimulator	4-8	**	**
Isoperla	Little Yellow Stones	Birds Nest	Little Yellow Stonefly	10-18		***	***

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