Current conditions report — Au Sable River — March 2026
Au Sable River is one of Michigan's premier trout fisheries, located in the Northern Lower Michigan region. The river is well known for producing quality Brown Trout and Brook Trout, drawing anglers from across the country throughout the season.
Fishing on Au Sable River varies significantly by season. Spring runoff typically peaks between April and June, with conditions improving as flows stabilize. Summer offers excellent dry fly opportunities during morning and evening hours. Fall is prime time for larger fish as brown trout move into spawning mode. Winter fishing can be exceptional during midday midge hatches.
Au Sable River supports healthy populations of Brown Trout, Brook Trout, Rainbow Trout. The river's diverse habitat — from fast riffles to deep pools — provides year-round holding water for trout of all sizes.
Always check the current Michigan fishing regulations before heading out. Regulations on Au Sable River may include special catch-and-release sections, artificial-only stretches, and seasonal closures. A valid Michigan fishing license is required.
Trout Bible pulls live flow and gauge data directly from the USGS National Water Information System. Current CFS (cubic feet per second) and gauge height readings are updated every 15–60 minutes, giving you the most accurate picture of conditions before you make the drive.