0000 Harbison Canyon Rd Tr 1840 Blk 6 Lot 6 Nice legal lot that should be able to build on it. Feasibility depends on the soils engineer if a septic is possible. The neighbors on both sides have larger lots and more space for a septic. The size of the lot and septic field will limit the size of the house. Currently a stone wall from the road with no driveway access. Lot has trees and bushes currently with no improvements or know reports, etc. Harbison Canyon is best known amongst locals for Old Ironsides County Park, a 3.6-acre, shaded grove of trees maintained by the San Diego County Parks and Recreation Department. The park is located at 326 Harbison Canyon Road, El Cajon, CA 92020. Park hours are sunrise to sunset. The park has a playground, basketball court, picnic tables (some covered), restrooms, and a municipal hall for different community and civic groups to meet. Ancient Kumeyaay relics have occasionally been found near the stream that runs through the park and canyon.