Gualala River Railroad

At its peak, it operated 22 miles (35 km) of track built to a unique broad gauge of 5 feet 8+1⁄2 inches (1,740 mm).

[a][1] As an arm of the mill and lacking passenger service, the railroad was owned by several companies over its lifetime.

Motive power was converted to steam operations in 1875,[2][3] with the railroad extending to 10 miles (16 km) of track by 1891.

[4] The tramway was initially laid to standard gauge, and the company's two horses would fight to take the center of the track.

This was still found insufficient to mitigate the issue, and the gauge was finally enlarged to 5 feet 8+1⁄2 inches (1,740 mm), which persisted through the life of the railroad.