The Provo River is a primary drainage system of the Great Basin. The river starts in the high Uinta Mountains and flows westward toward the Jordanelle Reservoir.
The river flows southward from the Jordanelle Dam through the Heber Valley Deer Creek Reservoir. From the Deer Creek Reservoir, the river flows Southwest through Provo Canyon (just south of Mount Timpanogos). The river empties into the Utah Lake near Provo, Utah.
The river between Utah Lake and the Great Salt Lake is called the Jordan River.
For some reason that I have yet to fathom, the section of the Provo River in the Uinta Mountains is administered by the Wasatch Cache National Forest. The section of the river that flows through the Wasatch Mountains is administered by the Uinta National Forest.