Los Penasquitos Canyon Preserve Professional Review and Guide
"A good choice for long and short hikes is Los Peñasquitos Canyon Preserve, with its meadows, tree-lined trails, and wide-open spaces. This 4100-acre natural park, jointly owned by city and county, was invaded in early 1988 by developers who built a 20-foot-high vehicle road from the west entrance to Lopez Ridge. It’s still a fine place to walk, though, and popular with mountain bikers and horseback riders too. There are creeks to cross, shallow pools to cool your feet in, even a little waterfall. Seven miles long from end to end, the canyon is a haven for wildlife. This guide contains 5 separate walks in Los Penasquitos Canyon Preserve and each is covered in detail."