(L-R) Maria Walton, Louise Turner, and David Bluestein of Phoenix, Ariz., took a minute to relax before joining the bus lines. Walton has run in Boston once before; this is Turner's third run, and Bluestein's sixth in Boston. Bluestein spent time on his Etch a Sketch drawing Snoopy cartoons and wrote "Boston" on Snoopy's dog house.