FLYMASTERMichigan · river
Au Sable River
The Au Sable River ( aw SAH-bəl) is a 138-mile-long (222 km) river in the Lower Peninsula of the U.S. state of Michigan. Rising in the Northern Lower Peninsula, the river flows in a generally southeasterly direction to its mouth at Lake Huron at the communities of Au Sable and Oscoda. From Wikipedia
- Length
- 137 mi
- Basin
- 1,970 sq mi
- Elevation
- 571 ft
- Rises at
- Kolke Creek
- Flows into
- Lake Huron
Flow now
Au Sable River At Mio, MI, 2 mi from the river.
994cfsat build, Nov 12, 12 PM MT
The typical week here, from 10 years of record: 789 cfs to 1,130 cfs, around 885 cfs.
Water temperature at the gauge: 45°F.
Also gauged at Au Sable River Near Red Oak, MI: 866 cfs, Nov 12.
The season, November
Usually workable this week. Pick your window and fish it well.
- Midgessizes 18 to 22
- Small eggs and worms
- Pheasant tail and zebra midge nymphsunder an indicator
Typical for the week over 10 years: 789 to 1,130 cfs. Running 994 cfs today, inside that range. Flows are not forecast; check the gauge the day before.
Brown Trout are spawning (October to December). Stay off clean, light-coloured gravel in riffle tails and pool tailouts, and leave paired fish alone.
Brook Trout are spawning (September to November). Stay off clean, light-coloured gravel in riffle tails and pool tailouts, and leave paired fish alone.
Mountain Whitefish are spawning (October to December). The egg bite behind spawning whitefish is the best winter nymphing of the year: an egg pattern below the riffles.
- Egg patterns in the runs below the spawning gravel, never on it.
Written by the app's rules engine from the calendar, the gauge record and the snowpack, not by hand, so it says only what the data says. The weather for the week comes with the app.
Fly shops on this water
- Gates Au Sable Lodge GraylingWebsiteFishing report, updated Nov 4
- Old AuSable Fly Shop GraylingWebsite
- The Northern Angler Traverse CityWebsiteFishing report, updated Oct 23
Nearby waters
- Lake Michigan17 mi
Open Au Sable River in FlyMaster for today's plan, the flies, and your own log here.
Flows from the U.S. Geological Survey, snowpack from the NRCS SNOTEL network, text from Wikipedia (CC BY-SA 4.0). Built Nov 12.