About this river
Saint Maries River is a 14.6 mile river near Conkling Marina & Resort in Idaho. Streamflow is measured at the USGS gauge ST Maries River near Santa, ID (site 12414900). The National Hydrography Dataset places it at stream order 6. Reach geometry comes from the USGS National Hydrography Dataset.
Typical flow by month
1966 to 2026
Saint Maries River typically runs highest in April, at a median 724 cfs, and lowest in September, at 54 cfs. The highest flow on record for any single day is 10,800 cfs, in 1996.
| Month | Typical (cfs) | Usual range (cfs) | Relative level |
|---|---|---|---|
| January | 205 | 107 to 424 | |
| February | 293 | 157 to 569 | |
| March | 614 | 359 to 916 | |
| April | 724 | 484 to 1,130 | |
| May | 591 | 350 to 916 | |
| June | 250 | 162 to 444 | |
| July | 101 | 77 to 148 | |
| August | 60 | 46 to 74 | |
| September | 54 | 43 to 67 | |
| October | 60 | 51 to 75 | |
| November | 96 | 69 to 144 | |
| December | 120 | 78 to 220 |
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 60 years of record. Statistics published by the US Geological Survey for ST Maries River near Santa, ID (site 12414900). Conditions on any given day can fall well outside the usual range. Check the current reading before you go.
Boat access nearby
One mapped launch sits in the mapped area of Saint Maries River. Ramp data comes from the USGS national boat-ramp inventory.
Embed this gauge on your site
Paste this snippet anywhere, an outfitter page, a club site, a trip report, to show Saint Maries 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.
