Los Peñasquitos Canyon Preserve
Visitor center, 12020 black mountain road take sr-56 to black mountain road exit, turn south, and proceed into the park, +1 858 484-7504, (http://www.sandiego.gov/p...). tu-sa 9am-5pm. a large park stretching several miles between the i-5/i-805 intersection and i-15, just south and roughly parallel to sr-56. there is much beautiful scenery which can be explored via the system of hiking, biking and equestrian trails. the park also contains a few historical landmarks, including the rancho de los penasquitos, one of the oldest surviving homes in the region, dating back to 1823. tours of the house are available every saturday at 11am. admission is free.
Marian Bear Memorial Park
(http://www.sandiego.gov/p...). located in the san clemente canyon along sr-52 from i-5 to i-805, this large park contains some very scenic trails.