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Heart River (North Dakota) facts for kids

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Heart River
Heart River.jpg
The Heart River, near Mandan, North Dakota, 1949.
Wpdms nasa topo heart river.jpg
A map of the Missouri River watershed, highlighting the Heart River.
Country United States
State North Dakota
Physical characteristics
Main source Near Saddle Butte
Belfield, Billings County
2,740 ft (840 m)
River mouth Missouri River
Bismarck, Morton County
1,624 ft (495 m)
Length 180 mi (290 km)
  • Location:
    Mandan, about 3 mi (4.8 km) above the mouth
  • Minimum rate:
    0 cu ft/s (0 m3/s)
  • Average rate:
    269 cu ft/s (7.6 m3/s)
  • Maximum rate:
    30,500 cu ft/s (860 m3/s)
Basin features
Basin size 3,370 sq mi (8,700 km2)

The Heart River is a tributary of the Missouri River, approximately 180 miles (290 km) long, in western North Dakota, United States.


The Heart River rises in the prairie country of Billings County, in the Little Missouri National Grassland near the south unit of Theodore Roosevelt National Park. It flows generally eastwardly through Stark County to Gladstone, past Belfield and South Heart, through the Patterson Reservoir and past Dickinson.

It is joined by the Green River at Gladstone, and turns east-southeastward into Grant County, passing through Lake Tschida, which is formed by the Heart Butte Dam. Below this dam, the river turns northeastward into Morton County, where it joins the Missouri River at Mandan.

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