Boyne River is a stream in Northern Michigan, named for the River Boyne in Leinster, Ireland. Together with the north and south branches, the river system has approximately 22 mi of mainstream and the water basin drains 40320 acre. Boyne River is Lake Charlevoix's second-largest tributary, after the Jordan River.

Course

Boyne River's mainstream is approximately 5.6 mi long, from the confluence of the north and south branches at 45.18139°N, -84.92°W less than a mile northwest of the village of Boyne Falls. The main branch flows northwest through Boyne City into Lake Charlevoix at 45.21472°N, -85.01472°W. The North Branch Boyne River is 5.9 mi long and rises in Hudson Township in eastern Charlevoix County at 45.17611°N, -84.81444°W. The South Branch Boyne River is 10.5 mi long and rises in Elmira Township in northwest Otsego County at 45.08611°N, -84.81167°W. The South Branch flows northwest across the northeast corner of Warner Township in Antrim County.

Impoundments

The river system has three major impoundments: The soils surrounding Boyne River's headwaters are primarily composed of a Kalkaska-Leelanau association (a mixture of Kalkaska and Leelanau sands), and tend to form steep riverbanks. Among the fish species living in Boyne River are chinook salmon, walleye, brook trout, brown trout, and rainbow trout.

Tributaries

Drainage basin

The Boyne River system drains all or portions of the following cities, townships, and villages: