Around here
Around Saint Marys River
Data Source: Recreation.gov · Source: USGS GNIS · Source: Canadian Geographical Names Database (NRCan), Open Government Licence - Canada · Public land: USGS PAD-US
About this river
Saint Marys River is a 54.9 mile river near Woods & Waters in Michigan. Streamflow is measured at the USGS gauge ST. Marys River at Sault Ste. Marie, Ontario (site 04127885). The National Hydrography Dataset places it at stream order 9. Reach geometry comes from the USGS National Hydrography Dataset.
Typical flow by month
2009 to 2026
Saint Marys River typically runs highest in August, at a median 91,200 cfs, and lowest in April, at 64,900 cfs. The highest flow on record for any single day is 115,000 cfs, in 2017.
Show the numbers
| Month | Typical (cfs) | Usual range (cfs) |
|---|---|---|
| January | 70,200 | 57,900 to 80,800 |
| February | 66,800 | 53,500 to 79,600 |
| March | 68,500 | 52,900 to 83,700 |
| April | 64,900 | 56,100 to 81,000 |
| May | 74,200 | 62,500 to 86,700 |
| June | 81,100 | 67,450 to 91,850 |
| July | 89,400 | 73,700 to 103,000 |
| August | 91,200 | 71,900 to 106,000 |
| September | 86,700 | 67,700 to 96,200 |
| October | 88,100 | 64,100 to 96,100 |
| November | 77,100 | 60,200 to 92,950 |
| December | 70,500 | 59,200 to 81,200 |
Typical is the median of each month’s daily median values, and the usual range runs from the median 25th to the median 75th percentile, across about 17 years of record. Statistics published by the US Geological Survey for ST. Marys River at Sault Ste. Marie, Ontario (site 04127885). Conditions on any given day can fall well outside the usual range. Check the current reading before you go.
Boat access nearby
7 mapped launches sit in the mapped area of Saint Marys River, all of them public access. Ramp data comes from the USGS national boat-ramp inventory.
- Raber BaySt. Marys RiverPublic
- Munuscong State ForestMunuscong RiverPublic
- Dunbar ParkCharlotte RiverPublic
- Brimley State ParkLake SuperiorPublic
- Riverside DriveSt. Marys RiverPublic
- William Gregory ParkSt. Marys RiverPublic
- Ashbun BaySt. Marys RiverPublic
Made to print
Put Saint Marys River on your wall
This river section as an art print, drawn over the real terrain with its miles, plus the trails, roads and peaks around it. Pick the colors and the size, and see the finished print before you buy. From $39, shipping included.
Embed this gauge on your site
Paste this snippet anywhere, an outfitter page, a club site, a trip report, to show Saint Marys River's live streamflow, water level and 7-day trend. It reads the USGS gauge directly, updates itself, and links back here.
See every free widget you can put on your site, including live conditions and a 7 day forecast.
