| River Calder | |
|---|---|
 The River Calder at Altham | |
 | |
| Location | |
| Country | England |
| Physical characteristics | |
| Source | |
| • location | Calderhead, Cliviger, Lancashire |
| • elevation | 758 ft (231 m)[1] |
| Mouth | |
• location | River Ribble near Brockhall Village |
• elevation | 100 ft (30 m)[2] |
| Length | 20 mi (32 km) |
The River Calder is a major tributary of the River Ribble in Lancashire, England, and is around 20 miles (32 km) in length.[a]
- ^ The geology of the Burnley coal-field and of the country around Clitheroe, Blackburn, Preston, Chorley, Haslingden, and Todmorden, Her Majesty's Stationery Office, 1875, p. 7, OCLC 270761418
- ^ Farrer, William; Brownbill, John, eds. (1911), The Victoria History of the County of Lancaster Vol 6, Victoria County History – Constable & Co, pp. 325–334, OCLC 270761418
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