Upper Mississippi River
| Upper Mississippi River | |
|---|---|
The Upper Mississippi River near Harpers Ferry, Iowa | |
| Location | |
| Country | US, Canada |
| Physical characteristics | |
| Source | |
| • location | Lake Itasca, Minnesota |
| • coordinates | 47°15′11″N 95°12′43″W / 47.253°N 95.212°W |
| • elevation | 450 m (1,480 ft) |
| Mouth | |
• location | St. Louis, Missouri (flows into the Middle Mississippi) |
| Length | 1,300 miles (2092.147 km) |
| Basin size | 490,000 km2 (190,000 sq mi) |
| Discharge | |
| • average | 5,796 m3/s (204,700 cu ft/s) |
The Upper Mississippi River is the portion of the Mississippi River upstream of St. Louis, Missouri, United States, a city at the confluence of its main tributary, the Missouri River. Historically, it may refer to the area above the Arkansas Post, above the confluence of Ohio River, or above Cape Girardeau.