March Brown

March Brown Flies

The March Brown hatch is one of the most anticipated spring mayfly hatches on trout rivers across North America. Both Western species (Rhithrogena) and Eastern species (Stenonema / Maccaffertium) produce large mayflies that bring trout to the surface during warm spring afternoons. These insects are commonly found on freestone rivers and riffled water where trout feed aggressively during the hatch.

March Browns typically appear from April through early June, depending on water temperatures and location. During the hatch, trout often feed on emerging nymphs first, followed by adult mayflies drifting on the surface.

Below you’ll find our selection of March Brown fly patterns, tied in proven styles and sizes for trout waters across the United States.