County Road 510 (CR 510, Co. Rd. 510) is a primary county road in Marquette County, Michigan, that connects Negaunee Township with the community of Big Bay. The road runs through rural forests as a paved and dirt road in northern Marquette County. It crosses the Dead River near the Hoist and McClure dams and runs for 26.103 miles (42.009 km) before terminating at an intersection with south of Big Bay.