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St. Marks River viewed from U.S. Highway 98

The St. Marks River is a river in the Big Bend region of Florida.

The St. Marks River begins at the south end of Lake Miccosukee in northwestern Jefferson County, Florida and flows 35 miles (56 km) through Leon and Wakulla counties into Apalachee Bay, an arm of the Gulf of Mexico. It has a drainage basin of 535 square miles (1,390 km²) in size. It has one significant tributary, the Wakulla River.

A few miles south of its source the St. Marks passes under a natural bridge and then disappears underground to become a subterranean river for about one-half mile. The river emerges to pass over a stretch of rocks, forming rapids.

The incorporated town of St. Marks is located at the juncture of the Wakulla and St. Marks Rivers. To the north is the community of Newport. Between St. Marks and Newport is a small industrial area serviced by barge.

The San Marcos de Apalache Historic State Park and St. Marks lighthouse are located near the mouth of the river.

List of crossings

This list is incomplete; you can help by expanding it.

Bridge	Route	Location	Coordinates
	Interstate 10
Rail Bridge	CSX	Capitola
	Leon CR 1540	Capitola
	US 27	Chaires Crossroads
	Leon CR 259	Cody
Natural Bridge
	Leon CR 2192	Natural Bridge Battlefield State Park
George Nesmith Bridge	US 98	Newport

References

• Marth, Marty. 1990. St. Marks River. in Marth, Del and Marty Marth, eds. The Rivers of Florida. Sarasota, Florida: Pineapple Press, Inc. ISBN 0-910923-70-1.