It flows approximately 6.2 miles (10.0 km), including its portion within the Scituate Reservoir.
[2] The river's source is Kimball Reservoir, located near Sickkibunkiaut Hill in Johnston.
From there, the river flows to Moswansicut Pond, then on to the Scituate Reservoir.
Huntinghouse and Peeptoad brooks are the only named tributaries of the Moswansicut River, though it has many unnamed streams that also feed it.
This article related to a river in Rhode Island is a stub.