Rancho Dorado Community San Marcos- LARGE HOMES SOME WITH HUGE SPANKING OCEAN VIEWS! Welcome to Rancho Dorado, a community of San Marcos CA in the 92078  zip code! Rancho Dorado is a unique neighborhood that has a lot of "pros" vs "cons". The market is on fire right now in 92078, if you are a buyer, seller, lookie loo or heck, a real estate investor, trust in me and my website when exploring San Marcos Homes For Sale in Rancho Dorado, and beyond. Rancho Dorado sits above Rancho Carrillo community ( Carlsbad) and many of these homes offer huge ocean views. It is actually built around what I like to call "the secret park", Simmons Park. Simmons Park is a good size park with playset, bathrooms, lots and lots of grass, perfect for soccer or football game, is pet friendly and has amazing oce... 03/19/2018