Tune Up Series for Shamrock Marathon/Half Marathon and other spring marathons/half marathons. Race course will begin and finish at the entrance to the Dismal Swamp Canal Trail, Chesapeake, VA 23323 and will be an out & back. Start will be a chip start and all runners will start 9:00am. Finish line closure is based for each race date on a 15 minute per mile. Early starts for walkers may be arranged by the Striders Walking Committee.