Anglers find success fishing from shore along public access sites or by drift boat, with the Bighorn's Afterbay Dam to Bighorn Access being a prime float route. Hot spots include bends, riffles, and undercut banks. Seasonal hatches (midges, blue-winged olives) make fly fishing effective year-round, with nymphs and streamers productive in cooler months. No piers or ramps exist at Water Birch itself, but nearby Bighorn Access offers boat launches. Check Montana FWP regulations before fishing, as this is a catch-and-release-focused area.