About this river
Stillwater River is a 20.1 mile river near Paddle Board Outfitters in Montana. Streamflow is measured at the USGS gauge Stillwater River at Lawrence Park, at Kalispell (site 12365700). The National Hydrography Dataset places it at stream order 6. Reach geometry comes from the USGS National Hydrography Dataset.
Typical flow by month
2007 to 2025
Stillwater River typically runs highest in May, at a median 921 cfs, and lowest in January, at 90 cfs. The highest flow on record for any single day is 3,860 cfs, in 2011.
| Month | Typical (cfs) | Usual range (cfs) | Relative level |
|---|---|---|---|
| January | 90 | 70 to 114 | |
| February | 93 | 68 to 110 | |
| March | 118 | 90 to 266 | |
| April | 521 | 272 to 773 | |
| May | 921 | 626 to 1,360 | |
| June | 653 | 486 to 1,125 | |
| July | 236 | 150 to 385 | |
| August | 132 | 92 to 174 | |
| September | 94 | 76 to 126 | |
| October | 92 | 72 to 117 | |
| November | 107 | 92 to 135 | |
| December | 94 | 77 to 136 |
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 18 years of record. Statistics published by the US Geological Survey for Stillwater River at Lawrence Park, at Kalispell (site 12365700). Conditions on any given day can fall well outside the usual range. Check the current reading before you go.
Embed this gauge on your site
Paste this snippet anywhere, an outfitter page, a club site, a trip report, to show Stillwater River's live streamflow, water level and 7-day trend. It reads the USGS gauge directly, updates itself, and links back here.
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