Road conditions from La Perla not passable as of a couple of days ago (according to somebody who got stuck near Mata Chica).

To answer your question though - San Pedro is about 6 miles south of La Perla. Whilst cart travel is not advised, bikes are great fun and can be rented for explorations. You can also take the Coastal Xpress in and out of town and/or stop off at spots along the way.