[4] The total combined drainage area for the five sub-basins of the Upper Qu'Appelle Watershed is 23,443 square kilometres (9,051 sq mi).

The source of the Moose Jaw River is Ibsen Lake,[6] which is about 6.4 kilometres (4.0 mi) west of Yellow Grass.

The Kingsway Dam (50°23′21″N 105°30′07″W / 50.3893°N 105.5019°W / 50.3893; -105.5019), which is owned and operated by the Saskatchewan Water Security Agency,[8] is 5 metres (16 ft) high and was built in 1948.

It helps control water flows along the Moose Jaw River and creates a 160-hectare (400-acre) reservoir in Wakamow Valley Park.

Avonlea Creek[11] begins near the Piapot Cree First Nation 75G and flows in a north-west direction paralleling Moose Jaw River until near the village of Avonlea where it turns north and meets Moose Jaw River about 6.4 kilometres (4.0 mi) south-west of Rouleau.