Serendipity Mountain Bike Trail

Bike only way down to Aro Valley avoiding the last part of Transient (i.e no more walkers). Starts with a couple of reasonable jumps and winds down the valley via a series of bermed corners and man-made features. There's a big drop off half way down, avoidable if you take the right-hand line (this is also steep, but not vertical). Big props to Brooklyn Trail Builders who have turned what used to be a dump into a near perfect piece of singletrack.