First Call Half Marathon

Waukesha, WI, USA · March 21, 2027
partly-cloudy-day36°·44° high·Breezy·Dry
9
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Race Day Weather

partly-cloudy-day
36°at start
44° high
Breezy
Dry

Cold start — layer up

Runners will start in chilly 36°F conditions — dress in layers for the corral and plan to shed early. Temperatures rising to 44°F through the course will gradually increase perceived effort in the second half. Light winds shouldn't be a major factor for pacing.

Race day forecast available in 170 days
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Distance: 13.1mi
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Race Plan

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True Effort pacing, weather-adjusted mile splits, fueling timeline with aid stations, packing checklist, carb tracker, spectator guide — all personalized to your goal and race-day conditions.

Race Conditions
Weather Splits
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Carb Tracker
Spectator Guide
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Race Info

The First Call Half Marathon starts and finishes at the E.B. Shurts Building in Waukesha's Fox River Sanctuary, running out-and-back along the Glacial Drumlin State Trail with a return leg on the Fox River Trail. First Call closes out Silver Circle Sports Events' Chilly Willy Winter Run Series each March, paired with a companion Last Call race the previous December. Results are on file back to at least 2018, alongside 5K and 10K options and a walker/ruck division.

FAQ

When is the 2027 First Call Half Marathon?

The 2027 First Call Half Marathon will be held on Sunday March 21, 2027.

Is the First Call Half Marathon a Boston Marathon Qualifier?

No, the First Call Half Marathon is NOT a Boston Marathon qualifier.

What will the weather be like for the 2027 First Call Half Marathon?

The forecast calls for a high of 44°F and a low of 32°F with a 10% chance of rain.

Historical Weather

Based on 2 years of data
Avg Temp
36°F
L:34° H:37°
RunScore
9
Conditions
Rain Freq
0%
0 of 2 yrs
Wind17mph
Dew27°F

Temperature History

Range of temperatures during race hours for each year.

Detailed History

YearConditionsLow / HighRainScoreResults
2026
partly-cloudy-day
34°/37°-
8
2024
cloudy
34°/37°-
9