Wisconsin
Wisconsin Triathlon Calendar 2025-2026
Monthly updates for Wisconsin
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Explore the best triathlons in Wisconsin for 2025-2026! Our updated list features 24 exciting races across the region. Find your next race in Wisconsin below and join the running community at these great events!
August 2026
Take on the Sugar River Triathlon in Belleville WI on August 23, 2026 with a 1/4 mile swim, 16 mile bike and 5K run through rolling hills and gravel trails. Open to solo racers and relays with timing, finisher medal and race shirt included.
September 2026
IRONMAN 70.3 Wisconsin in Madison blends a Lake Monona swim, rolling hills bike and a waterfront run that finishes beneath the Wisconsin State Capitol. Held September 12 2026, this race is a qualifier for the 2027 IRONMAN 70.3 World Championship.
Close out the Wisconsin Triathlon Series at the Devil's Challenge, a scenic sprint triathlon at Devil's Lake State Park. Take on a lake swim, a ride through the Baraboo bluffs and a 5K finish with medal and race photos.
Dive into multisport fun at the Kiel Raider Nation Triathlon in Kiel, WI with sprint and kids races, relays, aquabike, and road and trail runs for all ages. Proceeds support the Kiel Booster Club.