The Santa Catalina Mountains are a coastal mountain range in the Southern Bloxburg Valley, adjacent to the ocean. It is part of the Transverse Ranges . Because of its proximity to densely populated regions, it is one of the most visited natural areas in Bloxburg Valley. The Santa Catalina Mountains National Recreation Area is located in this mountain range.
The range extends approximately 40 miles (64 km) east-west from Bloxywood Hills and Las Sonrisas in Bloxburg to Point Mugu in Claire County . The western mountains, which separate the Conejo Valley from Santiago , end abruptly at Muga Peak when the rugged and nearly impassable coastline gives way to tidal lagoons and coastal sand dunes of the Dos Bocas floodplain . The mountain range contributed to the isolation of this vast coastal plain before regular transportation routes reached western Claire County. The eastern mountains form a barrier between the San Diego Valley and Los Angelox Basin, separating "the Valley" in the north and west-central Bloxburg City in the south. The Santa Catalina Mountains parallel the Santa Susana Mountains, which lie directly north of the mountains across the San Diego Valley.