Tags: Mountain Range.
The In-Ko-Pah Mountains are one of the Peninsular Ranges located near the U.S. border with Mexico in southern California west of the Jacumba Mountains. The range which lies in a north-south direction is located just north of Interstate 8 and east of the Manzanita Indian Reservation.The range is approximately 12 miles long. Mt. Tule at 4647 feet and Sombrero Peak at 4229 feet above sea level are the tallest mountains in the chain.