Amid a plan to move the 2020 Summer Games' marathons from Tokyo to Sapporo due to concerns over extreme heat, the games' organizing committee is considering starting and ending the events in Sapporo's Odori Park, several sources said Sunday.The new marathon course will be based in part on the annual Hokkaido Marathon in which Odori Park, located in the center of the city, also serves as the starting and finish lines.The park is being considered in place of Sapporo Dome, one of the International Olympic Committee's candidates, as it presents various logistical challenges such as narrow entra…READ FULL ARTICLE