The Bolsa Chica Ecological Reserve, in Huntington Beach (tel. 714/846-1114; www.bolsachica.org), is a 900-acre restored urban salt marsh that's a haven to more than 200 bird species, as well as a wide variety of protected plants and animals. Naturalists come to spot herons and egrets as well as California horn snails, jackknife clams, sea sponges, common jellyfish, and shore crabs. An easy 1.5-mile loop trail begins from a parking lot on Pacific Coast Highway (Calif. 1) a mile south of Warner Boulevard; docents lead a narrated walk the first Saturday of every month. The trail heads inland, over Inner Bolsa Bay and up Bolsa Chica bluffs. It then loops back toward the ocean over a dike that separates the Inner and Outer Bolsa bays and traverses a coastal sand-dune system. This beautiful hike is a terrific afternoon adventure. The Bolsa Chica Conservancy has been working since 1978 on reclaiming the wetlands from oil companies that began drilling here more than 70 years ago. It's an ongoing process, and you can still see those "seesaw" drills dotting the outer areas of the reserve.

Huntington City Beach, adjacent to Huntington Pier, is a haven for volleyball players and surfers; dense crowds abound, but so do amenities such as outdoor showers, beach rentals, and restrooms. Just south of the city beach is 3-mile-long Huntington State Beach. Both popular beaches have lifeguards and concession stands seasonally. The state beach also has restrooms, showers, barbecue pits, and a waterfront bike path. The main entrance is on Beach Boulevard, and there are access points all along Pacific Coast Highway (Calif. 1).

Newport Beach runs for about 5 miles and includes both Newport and Balboa piers. It has outdoor showers, restrooms, volleyball nets, and a vintage boardwalk that just may make you feel as though you've stepped 50 years back in time. Balboa Bikes N Beach Stuff (tel. 949/723-1516), at the corner of Balboa and Palm near the pier, rents a variety of items, from pier-fishing poles to bikes, beach umbrellas, and body boards. The Southwind Kayak Center, 17855 Sky Park Circle, Irvine (tel. 800/768-8494 or 949/261-0200; www.southwindkayaks.com), rents sea kayaks for use in the bay or open ocean at rates starting at $60 per day; instructional classes are available on weekends, with some midweek classes in summer. The center also conducts several easygoing guided outings, including a $55 Back to Nature trip that highlights the marine life around Dana Point.

Crystal Cove State Park (tel. 949/494-3539; www.crystalcovestatepark.com), which covers 3 miles of coastline between Corona del Mar and Laguna Beach and extends into the hills around El Moro Canyon, is a good alternative to the more popular beaches for seekers of solitude. (There are, however, lifeguards and restrooms.) The beach is a winding, sandy strip, backed with grassy terraces; high tide sometimes sections it into coves. The entire area offshore is an underwater nature preserve. There are four entrances, including Pelican Point and El Moro Canyon.

Salt Creek Beach Park lies below the palatial Ritz-Carlton Laguna Niguel; guests who tire of the pristine swimming pool can venture down the staircase on Ritz-Carlton Drive to wiggle their toes in the sand. The setting is spectacular, with wide white-sand beaches looking out toward Catalina Island. The park has lifeguards, restrooms, a snack bar, and convenient parking near the hotel.

Doheny State Beach in Dana Point, just south of Dana Point Marina (enter off Del Abispo St.), has long been known as a premier surfing spot and camping site. Doheny has the friendly vibe of beach parties in days gone by: Tree-shaded lawns give way to wide beaches, and picnicking and beach camping are encouraged. There are 121 sites that can be used for either tents or RVs, plus a state-run visitor center featuring several small aquariums of sea and tide-pool life. For more information and camping availability, call tel. 949/496-6172.

Note: This information was accurate when it was published, but can change without notice. Please be sure to confirm all rates and details directly with the companies in question before planning your trip.