Wisconsin Triathlon Calendar 2025-2026

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Explore the best triathlons in Wisconsin for 2025-2026! Our updated list features 223 exciting races across the region. Find your next race in Wisconsin below and join the running community at these great events!

April 2026
Apr
11
Saturday

NK50k

Trail Run 50 km
Apr
11
Saturday

Milwaukee Marathon

5 km 13 mi 26 mi
Apr
11
Saturday

MadCity Ultras

50 km 100 km
Apr
25
Saturday

Strides for Hope - Eau Claire

2 mi 5 km
May 2026
May
1-3
Fr - Su

Wausaultra Single, Double, Limitless

Backyard Ultra 4 mi
May
2
Saturday

Donald Dash Trail Run

Trail Run 5 km 15 km
May
2
Saturday

Door County Half Marathon

5 km 13 mi
May
2-3
Sa - Su

Eau Claire Marathon

5 km 10 km 13 mi 26 mi
May
2-3
Sa - Su

Prickly Pine Jackpot 24 Hour

Backyard Ultra 6 hr 12 hr 24 hr
May
9
Saturday

Lodi Optimist One Mother of a Run

5 km 11 mi
May
16
Saturday

Rumble on the Ridge

Backyard Ultra
May
16
Saturday

Syttende Mai Classic Run

2 mi 5 km 13 mi
May
16
Saturday

O'So Brewery Honor Flight 5K Run/Walk

5 km
May
17
Sunday

Wisconsin Pickle Run

2 mi 5 km
May
17
Sunday

Epic Marathon

5 km 13 mi 26 mi
May
23
Saturday

Sugar Badger 50 Miles

Trail Run 13 mi 50 km 50 mi
May
23
Saturday

Cedarburg Half Marathon

5 km 13 mi
May
23-24
Sa - Su

Run Madtown

5 km 10 km ... 24 km 100 km
May
30
Saturday

Strain for the Brain

5 km
June 2026
Jun
7
Sunday

Maritime Marathon

9 km 13 mi 26 mi
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