Save This Event For Later Whirlybird 'Cross (MAC #1) Bryn Athyn, PA, Sun Sep 10, 2017 Who's Registered? | Contact Event | Google Calendar | Race Predictor Start line address: 2945 College Drive, Bryn Athyn, PA 19020 Presented by Guy's Racing Club USA Cycling Permit # 2017-2024 This is a past event. If you wish to see the details for this event click, "Continue" below. There is a newer version of this event that may be what you're looking for: 9/9/2018 - Whirlybird 'Cross (MAC #2)