Two very large parks Memphis is known for -- Overton and Shelby Farms -- connected more or less by the Green Line rail trail. Did a little wandering about with some wrong turns (!@^*&$#@ garmin!) but still had a good time. Was able to route on either very low-traffic streets or streets with bike lanes or both. Cut through the middle of both parks to see what's what. Overton has a stand of really old forest in the middle of it, very very dense, very very much cooler than the outside and really dark in the middle of the afternoon with sunglasses. And a zoo with too many people and cars. Shoulda turned one entrance sooner headed north. Shelby Farms has a buffalo (!!) enclosure in the middle; didn't see any bufflers. Lots of really nice, wide paved trails, too, with the one along the Wolf River quite shady and cool. Body felt good. Knee steadily improves as the stretching continues. Had an unplanned rest at 18.7 while waiting for a train. Fine. Was aiming for 20 but 18 was just as good. No shade but it is unusually moderate for Memphis in August this week.