Explore the Alewife Brook and the Mystic River by bicycle with Will Brownsberger -- take a leisurely group ride to the Amelia Earhart dam and back, see the rugged urban beauty of the Mystic and visit and understand key flood control structures. Finish with breakfast or lunch in Davis Square (included in the package for up to six guests). Roughly 3 hours including meal. Any bike fine, but dress for some dirt -- none of this ride is steep or treacherous, but some of it is on dirt roads.