The Trailbreaker

Waukesha, WI, USA • March 29, 2026

Race Day Weather

27°

53° high

Windy

Dry

Cool start, warming trend ahead

Runners will face a steady temperature increase from 26°F at the start to 51°F by the finish. Wind will be a significant factor, with speeds reaching 22 mph from the SW and gusts up to 36 mph. Adjust pacing to account for the wind's impact, especially in open areas, and consider extra layers for the cooler start.

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Distance: 26.2mi

Target Finish Time

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Common Goals:

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. Both Marathon courses are certified by the USATF and may provide qualifying credentials for other races. We are excited to once again offer a 10K event at the Trailbreaker. 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. Source

Course Map

FAQ

When is the 2026 The Trailbreaker?

The 2026 The Trailbreaker will be held on Sunday March 29, 2026.

Is the The Trailbreaker a Boston Marathon Qualifier?

Yes, the The Trailbreaker is an official Boston Marathon qualifier.

What will the weather be like for the 2026 The Trailbreaker?

The forecast calls for a high of 55°F and a low of 27°F with a 19% chance of rain. Check our detailed hourly forecast above for the best marathon race plan.