Half Marathon

$50 04/10 8:00AM CDT Price increases after March 19, 2021 at 11:59pm CDT


$40 04/10 8:00AM CDT Registration closes on March 19, 2021 at 8:00am CDT and re-opens on March 19, 2021 at 8:01am CDT


$35 04/10 8:00AM CDT Price increases after March 19, 2021 at 11:59pm CDT

Virtual Half Marathon

$40 Registration ends April 10, 2021 at 11:59pm CDT

Virtual 10K

$35 Registration ends April 10, 2021 at 11:59pm CDT

Virtual 5K

$30 Registration ends April 10, 2021 at 11:59pm CDT
1120 Baxter Street
Schuetze Recreation Center
Waukesha, WI US 53186

In Person & Virtual Options for 2021

We are excited to announce the 2021 Trailbreaker is on! We will offer a half marathon, 10K and 5K race this year. We do not anticipate being able to acquire the necessary permits for the marathon and will work to bring it back in 2022.

How to Complete Your Deferral from 2020

Your race entry has already been deferred, but you need to claim your deferral if you want to run this year. Here is how to do it:

1.      Go to
2.      Click on Profile.
3.      Under the Deferrals tab, click Complete Deferral.
4.      Click Start Transfer.

Detailed instructions and screenshots are available under "How to Claim a Deferred Registration". You can scroll past the first half of the page because it explains how to defer a race, but your registration has already been deferred; all you need to do is claim it!

If you plan on running this year, we ask that you claim your deferral by Sunday, February 28th. Your spot in the 2021 Trailbreaker race is guaranteed through Sunday, February 28th. This year the races have registration caps on them. If you wait until after February 28th, registration for your event may be full.

If you want to defer to 2022, do nothing! You will be able to use the same process next year.

If you registered for the marathon in 2020 and want to run the half marathon for 2021, follow the instructions above. In 2022, you will receive a $22.00 credit to use on registration for any 2022 Trailbreaker event.

This will be a socially distanced race using our approved social distancing plan. Please review the plan prior to registering for the event.

About the Trailbreaker

The Trailbreaker is Waukesha's home grown running event and has been held annually since 1993. This Waukesha tradition initially consisted of a Marathon, Half-Marathon, and 5K Run/Walk.  The Trailbreaker originally was the brainchild of three running colleagues (amigos). Since 2009, the Park Foundation of Waukesha, Inc. (PFW Inc.), has organized and hosted this annual event as a fundraiser for the enhancement of city parks, trails, recreation programs and the urban forest.

Over $200,000 has been generated and re-invested with the Parks, Recreation and Forestry Department to "make Waukesha a better place to live, work and play". The PFW Inc. is a 501(c)3 organization that utilizes funds raised to promote "Community Quality of Life". All staff are unpaid volunteers. Please consider making a donation!

This event provides distances for all runners! Come join the fun and support our local parks and community!

Please note, we will not be able to exchange shirt sizes and shirts will not be sold. Shirts are unisex and tend to run large.


5K course map | 10K course map | Half marathon course map

The half marathon is a double out and back along the Fox River Trail (paved).

Tshirts & Finisher Medal

ALL runners of the 5k, 10k, or half will receive a long sleeve tech tee (register by 3/16/21, 11:59 CST, insulated mug after 3/16/21), finishers medal, and a free beer coupon from Raised Grain (must be 21+). All proceeds benefit Waukesha City Park, Recreation, and Forestry programs.

Packet Pickup & Schedule


You do not need to print it. We will need to scan the QR code on the receipt, though, so please have your email accessible on your mobile device or save a picture of your receipt with the QR code to your device’s image library.

Both packet pickups will be practicing social distancing. Cones will be placed 10' apart. Please wait at a cone until the individual in front of you moves to the next cone. This moves very quickly!

Early Packet Pick-up will be available from 5-7 am Friday, April 9th, 2021
Schuetze Recreation Center
1120 Baxter Street
Waukesha, WI 53186

Packet Pick Up will be available on race day - beginning at 7:30 am
Schuetze Recreation Center - Gymnasium
1120 Baxter Street
Waukesha, WI 53186

*please note packet pickup times may be adjusted based on attendance.


Sorry pets are not allow at the Trailbreaker.

Race Day Registration

There is no in-person race day registration. Please register using online registration and registration will stay open until race time. Virtual registration will stay open through April 11th.

Virtual Option

Not ready for in-person running? Go virtual!

How to run the race virtually:

  • Register for the virtual option.
  • Download the RaceJoy app.
  • Run the race between April 10th & April 11th.
  • The RaceJoy app will automatically upload your results.
  • Your packet will be mailed to you after the race.

Available for Apple and Android devices.

Interactive Race Day Experience with RaceJoy

Live Phone Tracking, GPS Progress Alerts and Cheers!

We are providing you with RaceJoy as part of the official race experience for the Trailbreaker.

Download the RaceJoy mobile app in advance to ensure proper phone setup. Invite your friends and family to track you and send you cheers!

Some key RaceJoy features include:

GPS Progress Alerts

  • Receive continual progress updates as you complete your goal.

Live GPS Tracking

  • Remote spectators can track your progress live in a map view. You can also track others.


  • Receive supportive audio cheers from remote friends & family.

Virtual Results (virtual events only)

  • Enter your race-assigned bib number to automatically submit your finish data for real-time scored results.
To use RaceJoy, you must carry your phone and activate tracking on the day you complete your race.
View RaceJoy How-To

The race is chip timed by Silver Circle Sports Events, LLC with a chip start. Your time will start when you cross the start line and stops when you cross the finish line.

How to wear your bib.

Changing Distances, Deferrals & Bib Transfers

Login into
Select your Profile.
Scroll down to the race you would like to modify.
Select "Manage Registration".
All of the race options will be listed on the menu (transfers, change shirts size, modify team, and change distances)

Aid Stations

Because we cannot guarantee a touch-free aid station, there are no aid stations on the course or at the finish line. There is a bag drop area located along the path between the EB Shurtz building (810 W College Ave, Waukesha, WI 53186) and the Glacial Drumline Trail. Signs will mark the zone. Runners will need to drop their bags prior to the race start in order to keep the event 100% touch-free. Coolers & chairs are permitted and both sides of the path can be used. Please keep all items spaced 10" apart.

Race Contact Info

If you have any questions about this race, click the button below.


Race Participant Survey

Please complete the following survey to help us better understand your race experience.

Did you participate in the race?

Would you recommend this race to a friend?

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