Benefit for Columbia Lighthouse for the Blind. Nationals Park, 1500 South Capital St., NW, Washington DC. 6:30 a.m., pick up packet. Timed Run and Kids races, 8 a.m.; Fun Walk, 8:45 a.m. Food, live bands, silent auction, victory lap on the field and giveaways. Register before September 1 at www.lighttheway5k.org and get a 10% discount.