26.TRUE Marathon

Runners will face temperatures starting at 44°F and rising to 50°F by late laps. Winds will be moderate at 11 mph from the NNW, creating a mix of headwind and tailwind effects throughout the course. With humidity at 64%, it's advisable to pace conservatively early and stay hydrated as temperatures climb. A light layer may be beneficial during the pre-race wait, given the cool feel and chance of light rain.

Race day forecast available in 151 days

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Distance: 26.2mi

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Race Info

The 26.TRUE Marathon is an unsanctioned, untimed marathon and half marathon in Boston, run by the Dorchester-based PIONEERS Run Crew on the Saturday before the Boston Marathon. Runners start and finish at Malcolm X Park in Roxbury and cover a 13.1-mile loop through Franklin Park, Jamaica Plain, Nubian Square, Dorchester and Mattapan, once for the half and twice for the full. The course is open, with no road closures, so runners stay on sidewalks and obey traffic signals. Entry is capped, and about 400 runners took part in 2026.

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Race weekend

Saturday, April 17

Marathon (26.2 mi)

Half Marathon (13.1 mi)

FAQ

When is the 2027 26.TRUE Marathon?

The 2027 26.TRUE Marathon will be held on Saturday April 17, 2027.

What will the weather be like for the 2027 26.TRUE Marathon?

The forecast calls for a high of 55°F and a low of 43°F with a 10% chance of rain.

Historical Weather

Based on 6 years of data

Avg Temp

57°F

L:53° H:60°

RunScore

Conditions

Rain Freq

17%

1 of 6 yrs

Wind12mph

Dew45°F

Temperature History

Range of temperatures during race hours for each year.

Detailed History

Year	Low / High	Rain	Dew Point
2026 26.TRUE Marathon Partly cloudy throughout the day. 2026	48°/50°	Light	48°
2025 26.TRUE Marathon Partly cloudy throughout the day. 2025	57°/73°	-	49°
2024 26.TRUE Marathon Partly cloudy throughout the day. 2024	48°/55°	-	43°
2023 26.TRUE Marathon Partly cloudy throughout the day. 2023	49°/57°	-	47°
2022 26.TRUE Marathon Partly cloudy throughout the day with late afternoon rain. 2022	55°/62°	-	30°
2021 26.TRUE Marathon Cloudy skies throughout the day. 2021	61°/64°	-	52°

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