San Dieguito River Park

San Dieguito River Park is a greenway of 92000 acre in San Diego County, California, United States. The park, established in 1989, stretches for 55 mi from the mouth of the San Dieguito Lagoon (a lagoon between Solana Beach and Del Mar) to the Volcan Mountain Wilderness Preserve close to Julian, following the San Dieguito River. The park is a joint powers authority comprising the county of San Diego and cities of Del Mar, Escondido, Poway, San Diego, and Solana Beach.

The park contains the Coast to Crest Trail with the planned length of 70 mi. As of 2017, 45 mi of the Coast to Crest Trail have been built, as were 20 mi of auxiliary trails.

Open space within the park is a home to multiple species, including 230 birds. Coastal sage scrub habitat includes Least Bell's Vireo, Cactus wren, California gnatcatcher and San Diego horned lizard.

A restoration project in the San Dieguito lagoon was completed in 2011 at the cost of 86 million dollars.