About this river
Heart River is a 2.8 mile river near Big Muddy Guide Service in North Dakota. Streamflow is measured at the USGS gauge Heart River near Mandan, ND (site 06349000). The mapped line runs from 46.8044, -100.8597 to 46.7674, -100.8421. The National Hydrography Dataset places it at stream order 7. Reach geometry comes from the USGS National Hydrography Dataset.
Typical flow by month
1924 to 2026
Heart River typically runs highest in April, at a median 230 cfs, and lowest in January, at 12 cfs. The highest flow on record for any single day is 28,400 cfs, in 1950.
| Month | Typical (cfs) | Usual range (cfs) | Relative level |
|---|---|---|---|
| January | 12 | 4.0 to 30 | |
| February | 12 | 3.0 to 34 | |
| March | 100 | 30 to 689 | |
| April | 230 | 75 to 724 | |
| May | 116 | 51 to 288 | |
| June | 131 | 65 to 293 | |
| July | 90 | 53 to 180 | |
| August | 70 | 43 to 108 | |
| September | 56 | 31 to 97 | |
| October | 41 | 23 to 68 | |
| November | 33 | 23 to 51 | |
| December | 20 | 12 to 38 |
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 94 years of record. Statistics published by the US Geological Survey for Heart River near Mandan, ND (site 06349000). 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 Heart 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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