2Slow4Boston Marathon

Greer, SC, USA · April 25, 2027
partly-cloudy-day58°·69° high·Light·Dry
7
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Race Day Weather

partly-cloudy-day
58°at start
76° high
Light
Dry
Your goal
0:00:00

Comfortable temps, big temp swing

Mild 58°F temps at gun time mean comfortable early miles without overheating risk. Temps will climb significantly to 76°F by later miles, so expect fading conditions as the race progresses. Light winds shouldn't be a major factor for pacing. Moderate humidity at 66% is worth noting for effort level, especially in later miles.

Race day forecast available in 190 days
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Pace Calculator

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Race Info

2Slow4Boston is an annual marathon, half marathon, and (starting 2027) 50K held in Greer, South Carolina, built around a loop course of a mile-plus repeated multiple times. The 2027 edition introduces a 12-hour time limit for all distances. The race began around 2014 under the name 'Too Slow for Boston' and has run every spring since, reaching its 14th marathon edition in 2027.

Race weekend

Sunday, April 25
7:30 AMMarathon (26.2 mi)
Half Marathon (13.1 mi)
50K (31.1 mi)
Area Map

Course Map

FAQ

When is the 2027 2Slow4Boston Marathon?

The 2027 2Slow4Boston Marathon will be held on Sunday April 25, 2027.

Is the 2Slow4Boston Marathon a Boston Marathon Qualifier?

No, the 2Slow4Boston Marathon is NOT a Boston Marathon qualifier.

What will the weather be like for the 2027 2Slow4Boston Marathon?

The forecast calls for a high of 76°F and a low of 55°F with a 12% chance of rain. Check our detailed hourly forecast above for the best marathon race plan.

Historical Weather

Based on 5 years of data
Avg Temp
61°F
L:56° H:68°
RunScore
6
Conditions
Rain Freq
40%
2 of 5 yrs
Wind5mph
Dew52°F

Temperature History

Range of temperatures during race hours for each year.

Detailed History

YearConditionsLow / HighRainScoreResults
2026
partly-cloudy-day
61°/69°-
5
2025
clear-day
57°/65°-
7
2024
clear-day
46°/75°-
7
2023
cloudy
62°/68°Light
6
2022
cloudy
54°/62°Light
8