Calder
Location of the Calder River mouth in Victoria
Etymology	River Calder in England[1]
Location
Country	Australia
State	Victoria
Region	South East Coastal Plain (IBRA), The Otways
Local government area	Colac Otway Shire
Physical characteristics
Source	Otway Ranges
• location	near Bateman Ridge
• coordinates	38°42′29″S 143°34′16″E / 38.70806°S 143.57111°E / -38.70806; 143.57111
• elevation	393 m (1,289 ft)
Mouth	confluence with the Aire River
• location	south of Lake Craven
• coordinates	38°47′52″S 143°28′43″E / 38.79778°S 143.47861°E / -38.79778; 143.47861
• elevation	0 m (0 ft)
Length	14 km (8.7 mi)
Basin features
River system	Corangamite catchment
National park	Port Campbell National Park
[2][3]

The Calder River is a perennial river of the Corangamite catchment, located in the Otways region of the Australian state of Victoria.

Location and features

The Calder River rises in the Otway Ranges in southwest Victoria, near Bateman Ridge and flows generally south by west through the Port Campbell National Park towards the settlement of Horden Vale where the river enters Lake Costin and then Lake Craven, before reaching its confluence with the Aire River shortly before the Aire enters Bass Strait, northwest of Cape Otway. From its highest point, the Calder River descends 393 metres (1,289 ft) over its 14-kilometre (8.7 mi) course.^[3]

Etymology

The river was named by surveyor George Smythe after the River Calder in Yorkshire, England, similarly a tributary of the River Aire.^[1]