Wisconsin
Wisconsin Triathlon Calendar 2026-2027
Monthly updates for Wisconsin
Get new running races (and updates) in your inbox every month.
Explore the best triathlons in Wisconsin for 2026-2027! Our updated list features 25 exciting races across the region. Find your next race in Wisconsin below and join the running community at these great events!
July 2026
A triathlon at Deacon Mills Park in Green Lake, Wisconsin on July 19, 2026 offering sprint and Olympic distances for individuals and relays, plus a Wisconsin Triathlon Series entry. Each format includes swim, bike, and run segments.
A multidistance triathlon in Oconomowoc, Wisconsin on July 25, 2026 featuring a swim in Lac La Belle, a bike through glacial countryside, and a run through downtown. Sprint, Olympic, Half Iron and relay options are available.
A paddle triathlon on July 25, 2026 offering solo tandem and relay classes, staggered paddle starts every 30 seconds, a mixed trail and road run, and an after party at the Hayward Curling Club with proceeds benefiting the club.
A triathlon in Merrill featuring a 2 mile paddle, a 17.5 mile bike, and a 5K run through local parks. Multiple divisions include solo, 19U, relay, tandem, and eBike, with awards for top finishers and community beneficiaries.
A lakeside race in Shell Lake, Wisconsin featuring concurrent sprint triathlon and duathlon formats around a 2,600-acre lake, with individual and team entries and medals for all participants.
A multi format triathlon at Ottawa Lake State Park on July 26, 2026 offering sprint and Olympic distances as individual and relay events, plus a Wisconsin Triathlon Series entry; published fees and registration dates are provided.
August 2026
A women's multisport event on August 9, 2026, in Pleasant Prairie, WI offering sprint triathlon, duathlon, relay and para sprint options. Registration runs November 17 to December 1, 2025, with fees from $95 to $190.
Waupaca Area Triathlon is a multi format weekend at Shadow Lake and downtown Waupaca on August 14 to 15, 2026. Events include swim bike run races, paddling options, youth and kids races, and relay entries.
A sprint triathlon in Cable, Wisconsin on August 15, 2026 featuring a 750 meter swim, a 12 mile bike and a 5 kilometer run. Individual and relay divisions are offered and the event supports the planned Telemark Activity Center.
W.I.L.D. Hodag Mini Triathlon in Rhinelander, Wisconsin on August 22, 2026 features a 300 yard swim or 1/2 mile kayak, a 10K off road bike and a 5K run. Proceeds support W.I.L.D. youth leadership programs.
A sprint triathlon at Belleville Community Park on August 23, 2026, with individual, relay and series entries. Distances include a 400 m swim, a 16 mile bike and a 5 km run.
A swim-run aquathon in Milwaukee on August 29, 2026 with three age groups: 8-10, 11-14, and 15 and older. Each race covers 1 mile at 1701 E Capital Dr.
September 2026
A multi-day ultra triathlon at Ottawa Lake State Park in Dousman, Wisconsin. Short loop courses provide constant support with an Aid Station and Athlete Village, personal crew access, and a 24-hour on-site medical team.
IRONMAN 70.3 Wisconsin in Madison on September 12, 2026 combines a Lake Monona swim, a rolling bike course and a hilly waterfront run that finishes by the Wisconsin State Capitol. The event also offers qualification for the 2027 IRONMAN 70.3 World Ch..
A multi-format triathlon at Fontana Beach on Geneva Lake offering Olympic, Sprint, relay, and collegiate sprint races. Events include lake swims, bike routes through rolling hills, and run courses through Fontana streets and parks.
A self-supported adventure triathlon in Iola, WI combining a 2 mile trail run, 7 mile gravel bike ride, and 2 mile paddle. Individual and 3-person relay entries available with entry fees and included race items.
A nonprofit fundraiser in Chippewa Falls featuring a triathlon with run bike and paddle legs, two 5K options, and a children’s one mile loop, with kayak and canoe rentals available first come first served.
IRONMAN Wisconsin in Madison combines a lake swim, a rolling bike route through Verona, and a hilly run finishing at the Wisconsin State Capitol. The course includes the Helix transition and runs through Camp Randall Stadium with lively spectator sup..
A sprint triathlon in Kewaskum on September 13, 2026 featuring a 5K run, a 2 mile kayak on the Milwaukee River and a 13 mile bike through Kettle Moraine. Individual and 2 to 3 person relay options are available plus a 1 mile youth run.
Rise & Run in Denmark, WI combines a run-bike-run duathlon with individual and two or three person relays plus a free one mile fun run where leashed dogs and strollers are allowed; proceeds support Arise missions.