Welcome to the Wisconsin Trail Assail Series! 🌲🏃‍♂️🏃‍♀️

Experience 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!

New for 2025 - WTA All Access Pass & Rucking!

🚀 Skip the Lines With The WTA All Access Pass! 🏃‍♂️

WTA All Access Pass?

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 and save $10 👕💰- 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 at All Events!

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:

Select your distance during registration (5K, 10K, or Half Marathon).
Don’t worry—you can switch distances for free at any time!
Please note: series registrations are non-deferrable.

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! 🌲👟