The Somerville Road Runners have partnered with Mighty Squirrel to bring a free weekly fun run to the Waltham community. Runners should show up by 6:30pm outside the main patio in nice weather or inside by the main bar in cooler weather, and the run will begin from the brewery at 6:45pm. Runners alternate courses each week. All courses are between 3.5 and 4.5 miles.