Date
March 29, 2026
Field Size
Small (<500)
PR Score
98.4 / 100
BQ Rate
8.1%
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PR Score of 98.4 indicates a mostly flat course, ideal for maintaining pace.
8.1% of finishers qualified for Boston in 2023, providing a realistic but challenging goal.
Small field size of 74 finishers means minimal congestion and easier spacing on the course.
Course primarily winds through scenic landscapes, enhancing the runner's experience with natural beauty.
The Trailbreaker Marathon in Waukesha, WI features a surprisingly flat course profile, reflected in its impressive PR score of 98.4. Given that it wraps through scenic parkland and along the Fox River, runners can find themselves connected to nature while maintaining a solid rhythm. With only 74 finishers in 2023, the race has an intimate feel, where each runner’s effort stands out. However, the BQ rate is just 8.1%, so it's not the easiest path to Boston qualification despite the course's favorable terrain.
Trailbreaker Marathon is an Emerging BQ venue — a legitimate qualifier for committed runners, though BQ rates are still building as the race grows. Historically, around 8.1% of finishers have posted Boston-qualifying times here. The course profile rewards runners who execute a well-paced effort from the start.
To maximize your chances of qualifying for Boston, start conservatively to avoid early fatigue, especially on the flat stretches. Focus on maintaining a consistent effort throughout, and take advantage of any downhills to gather speed without overexerting yourself.
Detailed elevation profile data is being prepared for this race. Check back soon for interactive course analysis.
Historical average based on 3-year data for this race date
Temp
48.5°F / 29.4°F
Conditions
Rainy
Precipitation
0.02 in
Wind
14.5 mph
Historical averages · Source: Open-Meteo · Actual conditions will vary
Typical conditions: Cool to mild (45–65°F), variable conditions. Spring race-day temperatures can shift quickly — check the forecast in the week before and plan your kit for a range of conditions.
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