Fair weather with reasonable temperatures is in store for Sunday’s Mount Greylock Trail Races. The Pittsfield, MA forecast calls for partly sunny skies with temperatures in the upper 70s. A five k race and the half marathon will both start at 10 AM. This year the half marathon route goes up the fabled Thunderbolt trail, over the summit, and meanders back down to Greylock Glen. What better way to spend Fathers’ Day?