[1] It was located near the mouth of Signal Creek 3.5 miles (5.6 km) northwest of Fish Rock,[2] at an elevation of 108 feet (33 m).

[1] The Signal post office operated for a time in 1882.

[2] The Signal Port post office operated from 1888 to 1890.

[2] The name refers to signals given ships waiting to load lumber at the site.

This Mendocino County, California–related article is a stub.