Mountain Quarries Bridge

The Mountain Quarries Bridge is a railway structure that crosses the North Fork American River using three concrete arches. It now serves pedestrians and horseback riders traveling through the Auburn State Recreation Area between El Dorado and Placer counties.

Built in 1912 by the Mountain Quarries Company from San Francisco, the bridge supported transportation of mining and cement products in the region. It stands as a key structure from the region's industrial era.

The structure represents early 20th-century engineering achievements and holds both National Register of Historic Places and California Historical Landmark designations.

The bridge is easily accessible for visitors walking or riding through the Auburn State Recreation Area. The setting offers straightforward access for outdoor exploration.

When a dam failed in 1964, this bridge became a critical emergency route for vehicles between counties after other structures were destroyed by flooding. It remains a testament to the durability of the original design.

Location: California

GPS coordinates: 38.91280,-121.04000

Latest update: December 14, 2025 12:23