Mount McCoy, Monumental cross at Mount McCoy in Simi Valley, United States.

Mount McCoy is a peak in Ventura County, California, crowned by a white metal cross standing roughly 12 feet tall at its summit. The mountain rises to about 1,325 feet above sea level and provides clear sightlines across the surrounding landscape from the top.

Spanish missionaries placed a wooden cross on the summit in the early 1800s to help guide travelers moving between the Ventura and San Fernando missions toward Rancho Simi. The modern metal cross that stands today was erected later to continue that original navigation purpose.

The cross is a landmark for the area that predates the town of Simi Valley itself. The summit cross and its immediate surroundings belong to the Simi Valley Historical Society, while the surrounding 200-acre nature area is run by the Rancho Simi Recreation and Park District. The peak was designated Ventura County Landmark No. 106 in 1986.

The main trailhead sits at 2 Washburn Street at the western end of Simi Valley; a shorter route starts near 56-58 Presidential Drive on the road to the Ronald Reagan Presidential Library. The summit and cross stand in a 200-acre nature area run by the Rancho Simi Recreation and Park District.

The view from the summit spans to the Channel Islands, the Santa Monica Mountains, and the San Gabriel Ranges, with Mount Baldy visible in the distance. On clear days this panorama reveals layers of geography that connect the local area to much larger regional features.