Sun Vista Park is a great perk for local residends Living in Olivenhain. Sun Vista is one of few parks in Olivenhain, including Wiro Park, Little Oaks Park.  Sun Vista Park is located at the southwest corner of Rancho Santa Fe Road and Avenida La Posta, across from Rancho Santa Fe Vista Properties. Enjoy a quick trip to the Sun Vista Park in Encinitas with the kids to play on the tot- lot, stroll your dog through the nicely maintained grass.