I'm very excited about this year's two day event. Pro Criterium Racers http://www.bostonbikes.org/events/mayors-cup/fly around City Hall Saturday while a carnival atmosphere builds in the plaza. Hub on Wheels Sunday 8AM you have your choice of 10, 30 or 50 miles of trails and market routes with volunteers, water and food stops and the best routes I've ever found through the city. First you get to ride a car free Storrow Drive and then weave through the cities parks, trails and neighborhoods. It is a blast and begins and ends with the sponsors and vendors booths and a circus like atmosphere. Nothing like it!