River Calder, Wyre
| River Calder | |
|---|---|
The River Calder, near its source | |
| Physical characteristics | |
| Source | Fiendsdale Head |
| • location | Forest of Bowland, Lancashire |
| • coordinates | 53°55′50.6″N 2°38′14.4″W / 53.930722°N 2.637333°W |
| • elevation | 1,440 feet (440 m) |
| Mouth | Barnacre-with-Bonds |
• location | Catterall |
• coordinates | 53°52′55.1″N 2°46′28.8″W / 53.881972°N 2.774667°W |
• elevation | 43 feet (13 m) |
| Length | 13 mi (21 km) |
| Basin size | 28 km2 (11 sq mi) |
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The River Calder is a 13-mile (21 km) long river that is one of the main tributaries of the River Wyre in Lancashire, England. Like the other rivers in England with the name Calder, its name is thought to derive from a mixture of Old Welsh and Old British words meaning "hard and violent water or stream".