This is a review of the approx. 7 mile part of the trail from it's paved start at Waterman Ave. to the county line. Pluses: easy parking at county Hall of Records building. Well paved path with lots of ups and down and twists to keep it from getting boring. Not crowded. Minuses: one of the more ugly bike trails I have seen. On one side is the sandy river bed filled with lots of trash. On the other, lots of barren, not much to look at land and industrial sites. All in all, I am sure there are nicer part of the Santa Ana trail to ride.