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!
February 2026
Take on the Tri Faster Indoor Triathlon at Wisconsin Athletic Club Greenfield on Feb 15, a timed swim, bike and run on pool, spin bikes and treadmills for ages 12 to 100. Enjoy awards, a race LED headlamp and post race refreshments.
April 2026
The Stubborn Fool Adventure Race is a choose your own route adventure near Black River Falls WI with solo and team divisions. Use map and compass to find hidden checkpoints on forest trails and gravel roads and pick your fastest route.
May 2026
Join the Waddling Warriors Adventure Race on May 2, 2026 at Wyalusing State Park, Wisconsin. Pick a 13 hour or 5 hour course mixing trekking, canoe paddling with gear provided, biking and orienteering for teams or solos, plus lodging and a post race..
Join the 2026 J Hawk Earlybird Race Series on May 3 in Whitewater, WI at UW Whitewater for sprint and Olympic triathlon, duathlon, aquabike and relay options. Fast courses and para divisions make this a great early race.
Dive into the Northwoods at the White Deer Triathlon, a paddle bike run challenge on scenic Boulder Lake and forest roads. Race solo or on a relay team, then celebrate with food, medals and an after party in Boulder Junction.
June 2026
Kick off the Wisconsin Triathlon Series on June 7, 2026 in Lake Mills WI with a fast, flat sprint course featuring a 400 m swim, 16 mile bike and 5K run. Enjoy a race shirt, finisher medal, timed results and pro photos.
Join Tri Faster SwimRun at Fox Brook Park in Brookfield on June 17, 2026. Swim open water loops or race an aquathon or 5k on a fast flat lakeside course, with chip timing, awards, showers and post race snacks.
Join the Wisconsin Triterium Triathlon in Verona on June 27, 2026 for sprint and Olympic distance races on a multi loop course at Fireman's Park. Expect a finisher medal, event tee, wave colored swim cap, pro timing, free photos and post race food.
Join the 16th annual Stubborn Mule Adventure Race June 27 to 28, 2026 for navigation, biking and paddling in a choose your own adventure format. Multiple time options start from a secret location near Cable, Wisconsin.
Pleasant Prairie Triathlon offers sprint, Olympic, duathlon and relay races around spring fed Lake Andrea in Prairie Springs Park. As the USAT Wisconsin State Championship it includes Age Group Nationals qualification and race swag.
Test your fitness at the Duck Creek Triathlon in Howard, WI on June 28, 2026. Enjoy a quarry swim, a 15.5 mile bike and a 5K finish on the Mountain Bay Trail, then join the post race party. Relay teams welcome.
July 2026
Join the Oconto Falls Dri Tri on July 11, 2026 at West Side Beach for a fun paddle, bike and 5K run or walk for all abilities. Waves welcome e bike and stand up paddleboard riders, with rentals, post race food and a charity raffle.
Race the Door County Triathlon in Egg Harbor on July 11 and 12 with Sprint, Olympic, Double Door and a kids event. myTEAM TRIUMPH pairs ANGEL guides with CAPTAIN athletes and has a Photo Circle for race photos.
Join the historic Pardeeville Triathlon on July 11 2026 in Pardeeville WI for a scenic Park Lake sprint race loved by spectators. A short swim, rolling 15 mile bike and fun 5K through town make it great for newbies and series racers.
Dive into the 27th Green Lake Triathlon on July 19, 2026 in Green Lake, WI. Enjoy a calm lake swim, rolling bike terrain, and a scenic lakeshore run through downtown, plus a race shirt, medal and photos to celebrate your finish.
Tri Faster SwimRun Race 2 at Fox Brook Park on July 22, 2026 features open water swims and a fast flat 5k loop around the lake. Events from 500 m to 1500 m plus Aquathon and a 5k run walk welcome ages 11 to 100.
Take on the Lake Country Triathlon July 25, 2026 in Oconomowoc at City Beach on Lac la Belle. Sprint, Olympic and Half Iron distances plus relays offer a scenic lake swim, rolling bike course and lakeside run with custom finisher gear.
Take on the Tricky Trout Paddle Triathlon for a unique paddle, run and bike challenge with Solo, Tandem and Relay classes. Race scenic waters and trails while supporting the Hayward Curling Club as proceeds benefit the club.
Join the 18th annual Triing for a Cure at Ottawa Lake State Park on July 26, 2026 with sprint and Olympic distances for individuals or relays. Scenic course, pro timing, race swag, photos and medals make this a perfect summer triathlon.
Train on Ironman Wisconsin and 70.3 swim bike and run courses with C26 coaches in Madison, July 30 to August 2 2026. Several days of coached sessions, open water swims, guided rides and team meals to sharpen race readiness.