Santiago Peak lies in Orange County, in the Trabuco Ranger District of the Cleveland National Forest at an elevation of 5,690 feet. The original 70-foot lookout tower was built in 1914, and was removed by the CCC in 1935. A 35-foot tower with a 10-foot cab was built in 1951. The remaining structure is currently surrounded by communications facilities

Santiago Peak 1914
Santiago Peak 1916
Santiago Peak 1960s
Santiago Peak 2008