The half marathon course at the Arbuckles to Ardmore Race for Mercy — officially titled the Valero Fast Half — starts at the county line that divides Murray and Carter counties, and then takes runners along Highway 77 south toward Ardmore, along a fairly steep downhill descent for the first mile, and then a much more gradual downhill over the next 8 miles. The course rises again after runners pass mile 9 but only very gradually, rising just over 100 feet to the finish line.
(MORE: A2A Race for Mercy Half Marathon event details)