The 2026 event has concluded.

The Trailbreaker

Waukesha, WI, USA · March 29, 2026
partly-cloudy-day40°·59° high·Windy·Dry
7
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Race Day Weather

partly-cloudy-day
40°at start
61° high
Windy
Dry

Cool morning, warming later

Runners will face a cool start at 38°F, gradually warming to 62°F. Wind from the SW at 14 mph with gusts up to 24 mph will challenge runners throughout. With humidity at 49%, hydration should be prioritized, especially as temperatures rise. Adjust pacing strategies to maintain energy in the warming conditions.

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Pace Calculator

Distance: 26.2mi
0:00:00
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Race Info

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

Area Map

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 62°F and a low of 39°F with a 0% chance of rain. Check our detailed hourly forecast above for the best marathon race plan.

Historical Weather

Based on 1 years of data
Avg Temp
44°F
L:30° H:44°
RunScore
8
Conditions
Rain Freq
0%
0 of 1 yrs
Wind11mph
Dew21°F

Temperature History

Range of temperatures during race hours for each year.

Detailed History

YearConditionsLow / HighRainScore
2025
partly-cloudy-day
30°/44°-
8