Race day — the 2026 Boston or Bust Marathon is underway.

Boston or Bust Marathon

Race day
Race day
partly-cloudy-day68°·87° high·Calm·Dry
6
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Race Day Weather

partly-cloudy-day
68°at start
90° high
Light
Dry

Warm start, big temp swing, high humidity

Starting at 68°F, heat will be a factor from the gun — go out conservative and stay on top of hydration. Temps will climb significantly to 90°F by later miles, so expect fading conditions as the race progresses. High humidity (82%) will make it harder to cool down through sweat — increase fluid intake accordingly.

clear-night7
partly-cloudy-night7
partly-cloudy-night7
partly-cloudy-day8
partly-cloudy-day7
partly-cloudy-day7
partly-cloudy-day5
clear-day4
clear-day5
clear-day5
clear-day5

Pace Calculator

Distance: 26.2mi
0:00:00
HH:MM:SS
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Weather Adj.
Common Goals:

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Race Plan

Get your personalized Boston or Bust Marathon race plan

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.

Race Conditions
Terrain Splits
Nutrition
Gear & Packing
T-Minus
Carb Tracker
Spectator Guide
Race Band

Race Info

The Boston or Bust Marathon and Half Marathon run an extremely flat, fast course along Aldridge Creek and the Tennessee River in south Huntsville, Alabama. Both distances start and finish at Ditto Landing Marina and stay entirely on the Aldridge Creek Greenway. Both courses will be USATF certified, and the race is a last-chance Boston Marathon qualifier each September. Source

FAQ

When is the 2026 Boston or Bust Marathon?

The 2026 Boston or Bust Marathon will be held on Sunday September 13, 2026.

Is the Boston or Bust Marathon a Boston Marathon Qualifier?

Yes, the Boston or Bust Marathon is an official Boston Marathon qualifier.

What is the time limit for the Boston or Bust Marathon?

The time limit for the Boston or Bust Marathon is 6 hours.

What will the weather be like for the 2026 Boston or Bust Marathon?

The forecast calls for a high of 91°F and a low of 68°F with a 1% chance of rain.

Historical Weather

Based on 4 years of data
Avg Temp
78°F
L:63° H:78°
RunScore
7
Conditions
Rain Freq
50%
2 of 4 yrs
Wind9mph
Dew60°F

Temperature History

Range of temperatures during race hours for each year.

Detailed History

YearConditionsLow / HighRainScoreResults
2025
clear-night
57°/75°Light
8
2024
clear-night
54°/77°-
8
2023
cloudy
68°/80°-
8
2022
rain
71°/78°Moderate
6