Big Lost River
| Big Lost River | |
|---|---|
Map of the lost streams of Idaho including the Big Lost River | |
| Location | |
| Country | United States |
| State | Idaho |
| Cities | Mackay, Arco, Atomic City |
| Physical characteristics | |
| Source | Confluence of North Fork and East Fork Big Lost River |
| • location | Custer County, Idaho |
| • coordinates | 43°56′01″N 114°06′38″W / 43.93361°N 114.11056°W |
| • elevation | 6,860 ft (2,090 m) |
| Mouth | Big Lost River Sinks |
• location | Butte County, Idaho |
• coordinates | 43°47′39″N 112°50′26″W / 43.79417°N 112.84056°W |
• elevation | 4,790 ft (1,460 m) |
| Length | 135 mi (217 km) |
| Basin size | 1,867 sq mi (4,840 km2) |
| Discharge | |
| • location | near Arco |
| • average | 86.3 cu ft/s (2.44 m3/s) |
| • minimum | 0 cu ft/s (0 m3/s) |
| • maximum | 2,500 cu ft/s (71 m3/s) |
| Basin features | |
| Tributaries | |
| • left | North Fork Big Lost River, Thousand Springs Creek |
| • right | East Fork Big Lost River, Antelope Creek |
The Big Lost River is a major river in the U.S. state of Idaho, about 135 miles (217 km) long.