[1] The source is a spring approximately 2 miles (3 km) northwest of Pringle Falls.

The river flows to the northeast and is about 12 miles (19 km) long.

[7][8] Fall River Falls is on the river within La Pine State Park.

[9] The Fall River also hosts the Fall River Hatchery, a state-run fish hatchery which raises rainbow trout, brook trout and cutthroat trout fingerling for stocking programs throughout the state.

[10] The river has one named tributary, Indian Creek, which enters from the left above the hatchery.