2027 Tamba-Sasayama ABC Marathon - Mar 7

An out-and-back road course starting and finishing by the Sasayama Castle ruins, running out through Tamba-Sasayama's satoyama farmland to a turnaround and back into the old castle town. No major climbs (about 55 m of relief), but a long gradual rise from roughly 10 km to 23 km gives way to a downhill-biased back half, so it rewards holding back early rather than a big surge. +80m elevation