RIVER GAUGE · ONTONAGON RIVER
Ontonagon River near Rockland
Ontonagon County, Michigan
Water level5.27 ft
Flow499 cfs
Last readingSep 16, 2026, 5:15 PM UTC (last recorded)
Action23 ft33,109 cfs
Minor flood25 ft
Moderate flood26 ft
Major flood28 ft
The past week
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What floods at each level
- 25 ft
Flooding may be occurring downstream in Ontonagon...especially during above normal lake levels or ice coverage near the mouth of the river.
Highest crests on record
| Date | Level | Flow |
|---|---|---|
| Aug 21, 1942 | 28.6 ft | 42,000 cfs |
| Apr 30, 2013 | 21.96 ft | 27,400 cfs |
| Apr 12, 2023 | 21.64 ft | 27,100 cfs |
Get an alert when Ontonagon River rises
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