Margarita Peak, Mountain summit in San Diego County, California.

Margarita Peak is a mountain summit in San Diego County, California, reaching 3,193 feet (973 m). It lies 9 miles (14 km) southwest of Murrieta Hot Springs and 9 miles (14 km) northwest of Fallbrook, and its summit is the 32nd most prominent peak in the county. The peak and the surrounding Margarita Peak Preserve are owned by the Fallbrook Land Conservancy.

The Fallbrook Land Conservancy acquired this area to protect natural habitats and support scientific research activities. This protection has significantly limited public access to the summit.

The name Margarita runs through the area: the main trail started on Margarita Road past the end of Tenaja Road, and the route passed Margarita Lookout before the summit. The Fallbrook Land Conservancy now keeps the peak and the surrounding Margarita Peak Preserve closed for biological studies and sensitive habitat.

Public access to the peak and the surrounding Margarita Peak Preserve is closed by the Fallbrook Land Conservancy for biological studies and sensitive habitat. The former route began on Margarita Road past the end of Tenaja Road, about 13 miles southwest of I-15, and ran 3 miles each way to the top. Reaching the summit required a steep, poorly maintained firebreak linking to the main trail.

The trail to the summit was 3 miles (4.8 km) each way, starting from Margarita Road past the end of Tenaja Road, 13 miles (21 km) southwest of I-15. Hikers connected to it by a steep, poorly maintained firebreak. The route was little used and known to few people.