Sierra Troutdoorsman is a California Department of Fish and Wildlife (CDFW) licensed fishing guide service based in Mammoth Lakes, California. Licensed guide: Alexander Fillmore.

Licensed services: general, fly, boat and catch & release fishing.

Species: bass, steelhead and trout.

Counties served: Inyo, Madera, Mono and Trinity.

License information from the CDFW public guide license lookup, October 2026. Is this your business? Claim this listing to add photos, your website and trip details.