If you’re looking for a pocket-sized hatch guide for Western streams, here are some excellent options:

Top Pocket-Sized Hatch Guides for Western Streams
1. “Western Mayfly Hatches” – Rick Hafele & Dave Hughes

HATCH GUIDE FOR WESTERN STREAMS - POCKET SIZED BOOK

– Covers key mayfly species in Western rivers.
– Compact and detailed with hatch timing, fly patterns, and presentation tips.

2. “Western Hatches” – Rick Hafele & Dave Hughes
– Expanded version covering mayflies, caddisflies, stoneflies, and midges.
– Still portable enough for a vest pocket.

3. “The Bug Book: A Fly Fisher’s Guide to Trout Stream Insects” – Paul Weamer
– Concise, waterproof, and fits in a pocket.
– Covers Western hatches with color photos and matching fly patterns.

4. “Pocketguide to Western Hatches” – Dave Hughes
– Specifically designed for quick reference on the stream.
– Includes hatch charts and effective fly imitations.

5. “Trout Stream Insects: An Orvis Streamside Guide” – Dick Pobst
– Small, durable, and packed with hatch info.
– Great for quick ID and fly selection.

Digital Alternatives
– “Troutnut” (troutnut.com) – Online hatch database with detailed photos.
– “Hatch Chart Apps” (e.g., Orvis Hatch App, Fishpond Hatch App) – Digital guides for Western hatches.

Best Budget Pick:
– “The Little Red Book of Fly Fishing” – Kirk Deeter & Charlie Meyers (includes hatch basics).

Would you like recommendations for specific regions (e.g., Rockies, Sierra Nevada, Pacific Northwest)?