Trailbreaker Marathon
Trailbreaker Marathon connects Waukesha's paved Glacial Drumlin and Fox River trails on a flat certified spring course with generous support access.
Quick facts
- Flat USATF-certified marathon course
- Glacial Drumlin and Fox River trails
- Long straight sections that encourage even splits
- Early-spring wind is the main resistance
Is registration open for the 2027 Trailbreaker Marathon?
Registration for the 2027 Trailbreaker Marathon is open.
About the Trailbreaker Marathon
This Wisconsin event offers the individual full alongside half, ruck and adaptive divisions. Marathoners receive their own entry option and result set within the wider race weekend.
Course
The mostly paved route follows the Glacial Drumlin and Fox River trail system over a level profile. Long straight sections encourage even splits, while early-spring wind can become the chief resistance.
Race-day weather
Late March and early April in Waukesha may bring freezing air, rain, snow flurries or mild sunshine. Trail exposure calls for layers that handle wind and changing temperatures.
Past Trailbreaker Marathon dates and results
| Year | Date | Status | Results |
|---|---|---|---|
| 2027 | Sunday, April 4, 2027 | Upcoming | — |
| 2026 | Sunday, March 29, 2026 | Completed | Open results |
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Trailbreaker Marathon FAQ
When is the Trailbreaker Marathon?
The 2027 Trailbreaker Marathon is on Sunday, April 4, 2027.
Is registration open for the 2027 Trailbreaker Marathon?
Registration for the 2027 Trailbreaker Marathon is open. View the official registration details at runsignup.com.
Is Trailbreaker Marathon a Boston qualifier?
Yes. Trailbreaker Marathon is a Boston Marathon qualifier. To use the result, you must run the certified full-marathon course within the qualifying window and meet the current standard for your age and gender. Meeting the standard lets you apply but does not guarantee entry, and net-downhill courses can receive a time adjustment under current B.A.A. rules. Review the Boston qualifying times and downhill-course rules, or browse upcoming Boston qualifier marathons.
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