Yes, on the classification rather than on a thermometer. Michigan stocks brook trout into the West Branch Pine River, and MDNR classes most of its typed water as cold — but no USGS gauge on this river reports water temperature, so this site has no measured July mean to hold against the 53–61 °F band this fish wants. Fish of 6–11 inches are what Michigan reports as typical. The river is designated Type 2 trout water, which is what sets the size and creel limits.
Native throughout, and the fish of the Upper Peninsula and the northern Lower's spring creeks. Lake Superior's coasters are the same species run to the lake.
No USGS gauge on this river reports water temperature, so there is no measured July mean to put beside the species' band. MDNR's classification of the typed reaches is Cold, and that is a classification rather than a thermometer.
| Gauge | Now | July mean |
|---|---|---|
| Au Sable River | 63.5 °F | 75.4 °F |
| Reach type | Miles | Minimum | Season |
|---|---|---|---|
| Type 1 Designated | 16.7 | 7″ | Last Saturday in April–September 30th |
From Michigan's own regulation tables, per designated type, and the current digest is the authority rather than this page. Full regulations for this river →
The insects recorded from this river's region, earliest first. The full calendar →
West Branch Pine River — live water temperature, regulations and access