San Onofre State Beach, located south of San Clemente on I-5, sits at the edge of a 3,000-acre scenic coastal canyon area. Native Acjachemen, Spanish missionaries, rancheros, caballeros, the United States Marines and surfing legends have all made history at San Onofre. The diverse recreational and natural offerings of this park’s three distinct sections - San Onofre Bluffs, San Onofre Surf Beach and San Mateo Campground - make it one of the most popular state parks in California. San Onofre Bluffs offers camping and day-use parking along Old Highway 101 adjacent to the sandstone bluffs. The beach below is popular with swimmers and surfers with six rugged dirt access trails cut into the bluff above. All campsites include a fire pit and picnic table. The campground offers cold outdoor showers and chemical toilets. No hookups are available however there is a dump-station. San Onofre Surf Beach offers a world renowned and historical surf break. The beach is strictly available for day-use with no camping. Chemical toilets and a limited number of fire pits are available. Alcohol is no longer permitted. San Onofre - San Mateo Campground lies a short distance inland from the 3.5-miles of sandy beaches within San Onofre State Beach. A 1.5-mile Nature Trail connects the campground to Trestles Beach, a world class surfing site. San Mateo Creek flows just east of the campground outward towards the ocean creating key riparian and wetland habitats which host some rare and even endangered species. All campsites include a fire pit and picnic table. Hookup sites are available with electricity and water. Other amenities include a dump-station, hot indoor showers, and flush toilets. Camping is available year-round.
The area and views are beautiful. Extremely secluded, and there are neat structures made out driftwood on the beach. The portion of the trail from Trail 1 that goes along the beach is all (well, mostly) rocks... dinosaur egg sized rocks. We tried to make it across them, then attempted to walk in the surf barefoot, to end up getting a wave up to our waist. Super amusing, and very beautiful, but we just turned back and explored the beachy part at the bottom of trail 1. Fun, but not what we expected.
I actually hike/walked from the north end of the San Onofre Nuclear Generating Station. There is a Vernal Pool Restoration Area there. The loop is .66 miles; however, I did a lot of side trails, circles and figure 8's to make this a 5.16 mile hike in 1hr 28min. All flat, very easy, and great views!