Cannonball Marathon

Greensboro, NC, USA · October 17, 2026
partly-cloudy-day52°·67° high·Light·Dry
8
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Race Day Weather

partly-cloudy-day
52°at start
69° high
Light
Dry

Comfortable temps, big temp swing

Mild 52°F temps at gun time mean comfortable early miles without overheating risk. Temps will climb significantly to 69°F by later miles, so expect fading conditions as the race progresses. Light winds shouldn't be a major factor for pacing.

Race day forecast available in 23 days
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Pace Calculator

Distance: 26.2mi
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Race Plan

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

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Race Info

The Cannonball Marathon is an annual marathon, half marathon, 10K, and 5K held in Greensboro, North Carolina, one of the longest-running road races in the state. The marathon and half marathon share a course starting and finishing at Jaycee Park within Country Park, following the Atlantic & Yadkin Greenway through north Greensboro; marathon runners complete two loops. The marathon is a Boston Marathon qualifier. Proceeds from the race support the adjacent Greensboro Science Center. Source

FAQ

When is the 2026 Cannonball Marathon?

The 2026 Cannonball Marathon will be held on Saturday October 17, 2026.

Is the Cannonball Marathon a Boston Marathon Qualifier?

Yes, the Cannonball Marathon is an official Boston Marathon qualifier.

What is the time limit for the Cannonball Marathon?

The time limit for the Cannonball Marathon is 6 hours.

What will the weather be like for the 2026 Cannonball Marathon?

The forecast calls for a high of 72°F and a low of 52°F with a 6% chance of rain.

Historical Weather

Based on 9 years of data
Avg Temp
69°F
L:53° H:69°
RunScore
8
Conditions
Rain Freq
11%
1 of 9 yrs
Wind4mph
Dew50°F

Temperature History

Range of temperatures during race hours for each year.

Detailed History

YearConditionsLow / HighRainScoreResults
2025
partly-cloudy-day
50°/75°-
8
2024
partly-cloudy-day
48°/72°-
9
2023
rain
58°/63°Light
6
2022
partly-cloudy-day
37°/67°-
8
2021
cloudy
52°/66°-
8
2019
partly-cloudy-day
58°/77°-
8
2018
partly-cloudy-day
55°/65°-
8
2017
cloudy
60°/66°-
8
2016
cloudy
55°/67°-
9