Chicago Triathlon $10 OFF Registration For 37 years, triathletes have gathered on the shores of Lake Michigan for one of the largest triathlons in the world. The Chicago Triathlon is an action-packed […] To access this content, you must purchase Seasonal Tri Club Membership, Annual Tri Club Membership, 2021 Beginner Tri Program Session 1 or 2021 Beginner Tri Program Session 2, or log in if you are a member. Post navigationPrevious post: South Beach TriathlonNext post: Scicon Bags