location_city Oconomowoc
location_on Wisconsin
flag United States
calendar_today 10 Apr, 2026 – 16 Oct, 2026
directions_run Running
language Official Website
RegisterExperience seven races over seven months, leading up to an epic series-ending championship! Set in the breathtaking Waukesha County and Wisconsin State Parks, our courses offer scenic trails suited for all fitness levels.
Choose from 5K, 10K, and Half Marathon distances—whether you're running, walking, or chasing a new PR, there's a place for you. Plus, our series is walker-friendly, so everyone can enjoy the adventure!
Ready to hit the trails? Join us and take on the challenge!
Your ticket to skipping the packet pickup line and heading straight to the start line!
How It Works:
✔ Register for the series in any distance 🏅
✔ Opt out of a shirt 👕💰- this automatically gets you the pass
✔ Receive a reusable ankle strap for timing ⏱️
✔ No check-in required – just show up and run! 🏃♂️🚀
More running, less waiting—because race day should be about the trails, not the lines. 🌲
Important Notice:
Your All Access Pass is non-transferable. Sharing your pass with another individual is not permitted. If someone else uses your pass, you will forfeit your access privileges.
Thank you for respecting this policy—it helps us keep the program fair for all participants.
Rucking is a physical activity that involves walking or hiking with a weighted backpack (called a rucksack). The term comes from the military, where soldiers train and operate carrying heavy loads over long distances. In civilian fitness and recreation, rucking is gaining popularity as a versatile and low-impact workout. We now offer it at all Wisconsin Trail Assail Events!
More information about rucking.
Series Registration:
Single Race Registration:
Want to participate in individual events? Click on the specific race link below to register for that event.
Kiddo's 1K Registration:
Our Kiddo's Races are always free! If your little one wants to join the fun, please register them for the individual Kiddo's race of your choice.
Get ready to explore the trails, challenge yourself, and have a blast with the Wisconsin Trail Assail Series! 🌲👟
Apr 10, 2026
Distance — 10K Ruck Series
Type — Road running
09:00
Apr 10, 2026
Distance — 5K Ruck Series
Type — Road running
09:00
Apr 10, 2026
Distance — WTA 10K Series
Type — Road running
09:00
Apr 10, 2026
Distance — WTA 5K Series
Type — Road running
09:00
Apr 10, 2026
Distance — WTA 5K Walk Series
Type — Road running
09:00
Apr 10, 2026
Distance — 13.1 Miles
Type — Road running
09:00
These values represent the 3-year monthly averages for April in Oconomowoc.
Oconomowoc is a city in Waukesha County, Wisconsin, United States. The name was derived from Coo-no-mo-wauk, the Potawatomi term for 'waterfall'. The population was 18,203 at the 2020 census. The city is partially adjacent to the Village of Lac La Belle and near the village of Oconomowoc Lake, Wisconsin.
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