The Mountain Quarries Bridge is a railroad bridge across the North Fork American River, near Auburn, spanning between El Dorado and Placer counties.

It is a concrete arch bridge that was built in 1912 to transport quarried rock.

The Mountain Quarries Bridge was listed on the National Register of Historic Places in 2004.

[1] According to its 2002 NRHP nomination — the bridge "although massive, ...is plain in appearance yet possesses a gracefulness that is in perfect harmony with its rugged surroundings.

This article about a property in Placer County, California on the National Register of Historic Places is a stub.