Bike, jog, ride, walk or skate the parkway from the Westchester County Center in White Plains to Scarsdale Road in Yonkers. Bicycle Sundays have been a beloved Westchester tradition since 1974. More than 60,000 participants each year bike, walk and jog a 13.1-mile loop of the Bronx River Parkway from White Plains to Yonkers. The parkway is open exclusively for bikes and pedestrians. Masks are required for all participants. Also: June 27; July 11, 18, 25; Aug. 1, 8, 15, 22, 29; Sept. 12, 19, 26; Oct. 3, 17, 24, 31.