The checkpoints for the Prologue are set. Riders start and finish at 1048 W. 37th Street. The first checkpoint will be just west of the 95th Street bridge that crosses the Calument River (approx. 3300 E. 95th St.). The second checkpoint will be at The Medici on 57th in Hyde Park (1327 E. 57th St.). Riders may choose their own route between checkpoints but the checkpoints must be completed in order. Total distance is about 23 miles depending on your routing and whether or not you like to slalom the dotted line. THE PROLOGUE - January 13 @ Bubbly Dynamics (bubblydynamics.com) 1048 W. 37th Street. Registration opens 7:00 a.m. Ride starts 8:00 a.m. The prologue will be an open course time trial with two checkpoints. The start/finish will be 1048 W. 37th. Riders will leave in either minute or thirty second intervals depending on turn out.by vxla