Ontonagon River
River in Michigan, read from its USGS gauge, draining about 1,340 square miles. Figures refresh every fifteen minutes.
Discharge
485
cfs · 43 min ago
Normal for today
802
cfs median, 84 yrs
Water temp
—
not measured here
Gage height
5.24
ft
Reading the number
On this date the gauge has averaged 802 cfs over 84 years of record, with the middle half of years falling between 550 and 1,060 cfs. Today is below that band: lower, clearer and, in summer, warmer water than a typical October day here.
Regional hatch calendar
What is likely hatching near Ontonagon River
Ontonagon River does not have its own verified chart yet. This calendar is combined from the verified charts on Namekagon River (108 mi), Wolf River (108 mi), Escanaba River (110 mi). Treat it as regional timing, and file a report if you see something different here.
| Insect | J | F | M | A | M | J | J | A | S | O | N | D |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Brown Drake | January: absent | February: absent | March: absent | April: absent | May: absent | June: peak | July: active | August: absent | September: absent | October: absent | November: absent | December: absent |
| Hendrickson | January: absent | February: absent | March: absent | April: active | May: peak | June: absent | July: absent | August: absent | September: absent | October: absent | November: absent | December: absent |
| Hex | January: absent | February: absent | March: absent | April: absent | May: absent | June: peak | July: peak | August: absent | September: absent | October: absent | November: absent | December: absent |
| Sulphur | January: absent | February: absent | March: absent | April: absent | May: peak | June: peak | July: active | August: absent | September: absent | October: absent | November: absent | December: absent |
| Blue-Winged Olive | January: absent | February: absent | March: active | April: peak | May: active | June: active | July: absent | August: absent | September: peak | October: active | November: absent | December: absent |
| Caddis | January: absent | February: absent | March: absent | April: absent | May: peak | June: peak | July: active | August: active | September: active | October: active | November: absent | December: absent |
| Isonychia | January: absent | February: absent | March: absent | April: absent | May: absent | June: active | July: peak | August: active | September: absent | October: absent | November: absent | December: absent |
| March Brown | January: absent | February: absent | March: absent | April: absent | May: active | June: peak | July: absent | August: absent | September: absent | October: absent | November: absent | December: absent |
| Terrestrials | January: absent | February: absent | March: absent | April: absent | May: absent | June: active | July: active | August: peak | September: active | October: absent | November: absent | December: absent |
| Trico | January: absent | February: absent | March: absent | April: absent | May: absent | June: absent | July: peak | August: peak | September: active | October: active | November: absent | December: absent |
| White Fly | January: absent | February: absent | March: absent | April: absent | May: absent | June: absent | July: absent | August: peak | September: peak | October: active | November: absent | December: absent |
| Grannom | January: absent | February: absent | March: absent | April: absent | May: active | June: active | July: active | August: active | September: absent | October: absent | November: absent | December: absent |
Reports
From anglers on Ontonagon River
No reports filed here yet. The first one becomes the page’s local knowledge, stamped with the flow at the time. File a report.