Malibu Lagoon State Beach is where Malibu Creek meets the Pacific Ocean. To get there, park either at the state lot (corner of Pacific Coast Highway and Cross Creek Road) for a fee ($12 in 2014), along Pacific Coast Highway or across the street in spots available near Malibu Country Mart and the Malibu Civic Center.
The lagoon is serene, with a sandbar of pelicans enjoying their summer day. This beach extends southeast to Surfrider Beach and the Malibu Pier, which is just a short walk away. While you're there try to check out the Adamson House and Malibu Lagoon Museum.
More information at www.parks.ca.gov/?page_id=835. Dogs are not allowed at Malibu Lagoon State Beach and trails.