Located near the southern end of the Cleveland National Forest, just north of Interstate 8, this triangular shaped mass clearly stands out to those traveling both east and west on the interstate.Ī rocky, partially overgrown use trail leading up the west slope offers the only straightforward passage to the summit. Reaching a height of 4,187 feet, Viejas Mountain rises above the surrounding hills in San Diego County and looms in the north over the small town of Alpine, CA.