Chula Vista Nature Center
Chula Vista Nature Center has almost everything for an outdoor enthusiast: a hiking trail, shark tank, stingray tank, several aviaries and sea turtles. The interactive exhibits are a great place to take children. Many of the animals featured were injured before they were rescued from the wild. Chula Visa Nature Center is a great place to learn about nature. The center is open Tuesday through Sunday, year-round.
Torrey Pines State Natural Reserve
Torrey Pines State Natural Reserve is a hiker's dream. The reserve features eight miles of trails. Guided tours and walks are available on weekends and holidays. Take your pick from a collection of seven trails, including the experts-only Beach Trail and the beginner's High Point Trail. The reserve is open year-round; the visitor's center is open until 4 pm during the winter and 6 pm the rest of the year.
While Balboa Park is primarily an urban park, it has plenty to offer the outdoor enthusiast. Hikers and mountain bikers will find the Florida Canyon Hiking and Biking Trails incredible, as they make their way through the rocky hillsides. The Balboa Park Activity Center features 38,000 square-feet of fun with badminton, volleyball and tennis, not to mention the numerous gardens, museums and restaurants. Balboa Park is also home to the world-famous San Diego Zoo. If you're around San Diego the week of Halloween, be sure to check out the annual "Haunted Trail of Balboa Park."
One cannot mention San Diego without mentioning Sea World Adventure Park. You probably already know Sea World has some of the most incredible shows, exhibits and rides in the world--but you probably didn't know Sea World San Diego has camping adventures for families. You can spend your days with Shamu and your nights adventuring camping in Sea World San Diego.
You won't find trails or many outdoor activities in Legoland, but you will find a nice break from those activities. Legoland in San Diego is one of only four Legoland theme parks in the world--it's also the only one in the United States. Legoland offers a fantastic experience for children and allows adults to revisit their favorite childhood toy.
Qualcomm Stadium is the perfect spot for for spectator-sport enthusiasts. Not only do the San Diego State University Aztecs play at the stadium; the NFL's San Diego Chargers do too. When it's not football season, you'll likely find other spectator events at Qualcomm Stadium, such as auto racing and U.S. Rugby. Qualcomm Stadium has hosted the Super Bowl three times: in 1988, 1998 and 2003.
If you enjoy spectator-sports, but prefer baseball to football, look no further than Petco Park. Petco Park is the home of the San Diego Padres. The park is one of the best in Major League Baseball; it's also one of the newest, as it was constructed in 2004.
If you're looking for something really exciting, you'll need to look no further than Sail USA-11 in San Diego. Sail USA-11 offers a 2 1/2 hour experience on a carbon-fiber racing yacht for just $100 per person. No experience is necessary to join the adventure.
Black's Beach is a beautiful two-mile strip of sand and water. Black's beach is extremely difficult to access, which makes it a dream for brave hikers. Cliffs of 300 feet and some of the largest waves on the west coast make Black's Beach the place to be for outdoor enthusiasts. One should be cautious, however, because although nudity is not permitted on Black's Beach, it is very common.
Mission Trails Regional Park
Mission Trails Regional Park includes a whopping 5,800 acres of wilderness. The park has over 40 miles of hiking trails, an interactive visitor's center and offers camping on Lake Kumeyaay. Guided walks are available on Saturday, Sunday and Wednesday.