Michigan Triathlon Calendar 2025-2026

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Explore the best triathlons in Michigan for 2025-2026! Our updated list features 429 exciting races across the region. Find your next race in Michigan below and join the running community at these great events!

September 2025
Sep
28
Sunday

Growler Gallop

5 km 10 mi
Sep
28
Sunday

Quarry Challenge

5 km
Sep
28
Sunday

Heritage 50K Trail Run

Trail Run 13 mi 50 km
Sep
28
Sunday

Ann Arbor Marathon

5 km 10 km 13 mi 26 mi
Sep
28
Sunday

She Runs Grand Rapids

5 km 10 km 13 mi
October 2025
Oct
4
Saturday

North Shore Trail Run

Trail Run 5 km 10 km
Oct
4
Saturday

The Lucky Pumpkin 5K

5 km
Oct
4
Saturday

Divot Dash 5K

5 km
Oct
4-5
Sa - Su

Bear Lake Ultra

Backyard Ultra 24 hr
Oct
4
Saturday

Sleeping Bear Marathon

5 km 13 mi 26 mi
Oct
4
Saturday

Orthopaedic Rehab Specialists Oktoberfest 10K

5 km 10 km
Oct
4
Saturday

Crooked Loops Trail Run

Trail Run 2 mi 5 mi 8 mi
Oct
4-5
Sa - Su

Rusty Fish Marathon

26 mi
Oct
5
Sunday

Oktoberfest Runs @ Stony Creek

5 km 10 km 13 mi 30 km
Oct
11
Saturday

Timber Trails 5K

Trail Run 5 km
Oct
11
Saturday

Heart & Sole Run in Memory of Courtney Frazine

5 km
Oct
11
Saturday

Wolverine State 100

Trail Run 50 km 100 km 100 mi
Oct
11
Saturday

Carman-Ainsworth Charge On 5k Run & Walk

5 km
Oct
11
Saturday

Sean Brady Memorial

5 km
Oct
12
Sunday

13 Ghosts Half Marathon

Trail Run 4 mi 13 km 13 mi
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