Viejas Mountain is a 4,189-foot peak in the Cleveland National Forest in San Diego County, California, with its summit about 3 miles northeast of Alpine. Visible from parts of metropolitan San Diego, it stands out as a familiar feature of the county’s inland landscape. At this elevation, it ranks as the 48th tallest peak in San Diego County. Its height, visibility, and position above Alpine give it a notable presence in the surrounding region.