Allen River

Allen River
Route of the Allen River
Mouth of the Allen River Show map of New Zealand Allen River (South Island) Show map of South Island
Location
Country	New Zealand
Physical characteristics
Source	Allen Range (Left Branch)
• coordinates	41°24′00″S 172°16′20″E / 41.3999°S 172.2723°E / -41.3999; 172.2723
2nd source	Allen Range (Right Branch)
• coordinates	41°24′58″S 172°20′29″E / 41.4160°S 172.3413°E / -41.4160; 172.3413
Mouth
• location	Mōkihinui River North Branch
• coordinates	41°28′39″S 172°17′21″E / 41.4775°S 172.289167°E / -41.4775; 172.289167
• elevation	310 m (1,020 ft)
Basin features
Progression	Allen River → Mōkihinui River North Branch → Mōkihinui River → Karamea Bight → Tasman Sea
Tributaries
• right	Johnson River

The Allen River is a river in the West Coast district of the South Island of New Zealand. It drains the south side of the Allen Range, elevations to 1,450 metres (4,760 ft), which forms part of the boundary between West Coast and Tasman districts. The river has left and right branches for half its length, and the right branch has a major tributary stream in a valley between the two branches. The united river flows south through a narrow gorge and is joined by the Johnson River 200 metres (660 ft) upstream of its confluence with the North branch of the Mōkihinui River.