The Trailbreaker Half Marathon

Waukesha, WI, USA · April 4, 2027·
partly-cloudy-day37°·41° high·Breezy·Dry
10
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Race Day Weather

partly-cloudy-day
37°at start
45° high
Breezy
Dry
Your goal
0:00:00

Cold start — layer up, moderate wind

Runners will start in chilly 37°F conditions — dress in layers for the corral and plan to shed early. Moderate winds around 13mph may affect pacing on open sections of the course. Moderate humidity at 67% is worth noting for effort level, especially in later miles.

Race day forecast available in 156 days
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Pace Calculator

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Race Plan

Get your personalized The Trailbreaker Half Marathon race plan

A mile-by-mile breakdown of where your time goes, weather-adjusted splits, fueling timeline with aid stations, packing checklist, carb tracker, spectator guide, all built around your goal and race-day conditions.

Race Pace
Weather Splits
Nutrition
Gear & Packing
T-Minus
Carb Tracker
Spectator Guide
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Race Info

The Trailbreaker Half Marathon covers 13.1 miles and starts and finishes at the Schuetze Recreation Center in Frame Park, Waukesha. It is an out-and-back course that heads southwest and west of the start before returning along the same route to the finish by the Fox River. The elevation change is gentle, and the race is held on the Sunday of race weekend.

Race weekend

Sunday, April 4
7:45 AMKiddos 1K (0.6 mi)
8:00 AMMarathon (26.2 mi)
8:00 AMHalf Marathon (13.1 mi)
8:15 AM10K (6.2 mi)8:15 AM5K (3.1 mi)

FAQ

When is the 2027 The Trailbreaker Half Marathon?

The 2027 The Trailbreaker Half Marathon will be held on Sunday April 4, 2027.

What is the time limit for the The Trailbreaker Half Marathon?

The time limit for the The Trailbreaker Half Marathon is 6 hours.

What will the weather be like for the 2027 The Trailbreaker Half Marathon?

The forecast calls for a high of 48°F and a low of 36°F with a 13% chance of rain. Check our detailed hourly forecast above for the best half marathon race plan.

Historical Weather

Based on 5 years of data
Avg Temp
42°F
L:40° H:44°
RunScore
10
Conditions
Rain Freq
20%
1 of 5 yrs
Wind9mph
Dew31°F

Temperature History

Range of temperatures during race hours for each year.

Detailed History

YearConditionsLow / HighRainScoreResults
2026
partly-cloudy-day
42°/49°-
9
2025
partly-cloudy-day
35°/40°-
10
2024
partly-cloudy-day
42°/45°-
9
2022
cloudy
35°/38°Light
10
2019
cloudy
46°/48°-
10