Red Deer River is a river is in Alberta, Canada, it is a tributary of the South Saskatchewan River. For the Second World War frigate class, see River class frigate The Murray River in Australia A waterfall on the Ova da Fedoz, Switzerland A river is a large natural waterway. ... Motto: Fortis et Liber (Strong and free) Other Canadian provinces and territories Capital Edmonton Largest city Calgary Lieutenant Governor Norman Kwong Premier Ralph Klein (PC) Area 661,848 km² (6th)  - Land 642,317 km²  - Water 19,531 km² (2. ... A tributary (or affluent or confluent) is a contributory stream, a river that does not reach the sea, but joins another major river (a parent river), to which it contributes its waters, swelling its discharge. ... The South Saskatchewan River flows eastward from the confluence of the Bow and Oldman Rivers near Grassy Lake, Alberta. ...