Triathlons in Marlborough, CT
Marlborough, CT is home to 6+ triathlon events. Whether you are looking for a competitive race or a casual weekend event, the Marlborough triathlon scene has something for every level. Find and register below.
Triathlon
Lake Terramuggus Sprint Triathlon
Marlborough, CT
Triathlon
Lake Terramuggus Sprint Triathlon
June 20, 2026
Marlborough, CT
Frequently Asked Questions
Are there beginner triathlons in Marlborough?▾
Yes. Sprint-distance triathlons (750m swim, 20km bike, 5km run) are available near Marlborough and are perfect for first-timers. Most can be completed in under 2 hours.
What triathlon distances are available near Marlborough?▾
Events near Marlborough include sprint, Olympic, half-Ironman, and full Ironman distances. RACE lists all triathlon events with distance details and registration links.