Holy Water stretch between Grayling and Mio. Premier wild trout fishery in the Midwest. Flies-only designated reaches, pristine spring-fed currents, legendary hatches. Home to Hex, Sulphur, and world-class rising brown trout.
Species present: Brown trout, Rainbow trout. Stream type: freestone.
Based on current water temperature (63.7°F) and time of year, the following insects are active or expected on the AuSable River.
| Hatch | Latin | Top Patterns | Time of Day |
|---|---|---|---|
| Trico | Tricorythodes spp. | CDC Trico Spinner #20, Trico Dun #20 | morning |
| Terrestrials | Beetles, ants, hoppers, crickets | Foam Beetle #12, Chernobyl Ant #10 | afternoon |
| White Fly | Ephoron leukon | White Wulff #12, White Comparadun #14 | night |