Illinois River (Arkansas–Oklahoma)
| Illinois River | |
|---|---|
The Illinois River, seen here in the upper stretches of Tenkiller Ferry Lake | |
| Location | |
| Country | United States |
| States | Arkansas, Oklahoma |
| Physical characteristics | |
| Source | |
| • location | Ozark Mountains |
| • coordinates | 35°51′08″N 94°17′23″W / 35.85222°N 94.28972°W |
| Mouth | |
• location | Arkansas River |
• coordinates | 35°29′21″N 95°05′52″W / 35.48917°N 95.09778°W |
• elevation | 459 ft (140 m) |
| Length | 98.8 mi (159.0 km) |
| Discharge | |
| • location | Gore |
| • average | 1,551 cu ft/s (43.9 m3/s) |
The Illinois River is a 145-mile-long (233 km) tributary of the Arkansas River in the U.S. states of Arkansas and Oklahoma. The Osage Indians named it Ne-eng-wah-kon-dah, which translates as "Medicine Stone River". The state of Oklahoma has designated its portion as a Scenic River.