I rode Santa Teresa after work yesterday. Riding down Stile Ranch trail back to the Fortini Road parking area I noticed that some rather large (basket ball to medicine ball sized) boulders have found their way into the middle of the trail. It was pretty apparent that they were placed there (not embedded like the rest of the rocks on the trail). I moved one (about the size of 2 watermelons) that was smack dab in the middle of one of the switch backs, but I think there were about ten more along the trail.
Just wanted to give a heads up, running into one of those rocks at speed would not be a lot of fun.