About this river
Grand River is a 31.7 mile river near MoPro Guide Service in South Dakota. Streamflow is measured at the USGS gauge Grand River at Little Eagle, SD (site 06357800). The National Hydrography Dataset places it at stream order 8. Reach geometry comes from the USGS National Hydrography Dataset.
Typical flow by month
1959 to 2026
Grand River typically runs highest in March, at a median 160 cfs, and lowest in January, at 22 cfs. The highest flow on record for any single day is 28,400 cfs, in 2009.
| Month | Typical (cfs) | Usual range (cfs) | Relative level |
|---|---|---|---|
| January | 22 | 5.3 to 55 | |
| February | 36 | 6.4 to 90 | |
| March | 160 | 75 to 543 | |
| April | 156 | 67 to 564 | |
| May | 142 | 48 to 490 | |
| June | 147 | 56 to 403 | |
| July | 92 | 40 to 198 | |
| August | 66 | 29 to 125 | |
| September | 65 | 26 to 110 | |
| October | 61 | 23 to 114 | |
| November | 52 | 21 to 94 | |
| December | 30 | 10 to 68 |
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 67 years of record. Statistics published by the US Geological Survey for Grand River at Little Eagle, SD (site 06357800). Conditions on any given day can fall well outside the usual range. Check the current reading before you go.
Boat access nearby
3 mapped launches sit in the mapped area of Grand River, all of them public access. Ramp data comes from the USGS national boat-ramp inventory.
- The BayPublic
- Indian Memorial Recreation AreaPublic
- Grand RiverPublic
Embed this gauge on your site
Paste this snippet anywhere, an outfitter page, a club site, a trip report, to show Grand 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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