Adirondack Marathon

Schroon Lake, NY, USA · September 27, 2026

57°·70° high·Light·Dry

Weather

Race Day Weather

57°at start

71° high

Light

Dry

Cool start, warming fast

Runners will face a temperature rise from 55°F at the start to a peak of 71°F. With humidity at 70% and a gentle breeze from the S, hydration should be prioritized. Adjusting pace conservatively early on is advised to manage the warming conditions throughout the race.

Race day forecast available in 31 days

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Distance: 26.2mi

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Race Info

The Marathon, Half Marathon, and the 2 & 4 Person Relays, which will take place around the picturesque 9-mile-long Schroon Lake on Sunday. On Saturday, you can participate in the 5K & 10K in Chestertown, or bring your little ones along for the Kids Fun Run in Schroon Lake. Source

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Course Map

FAQ

When is the 2026 Adirondack Marathon?

The 2026 Adirondack Marathon will be held on Sunday September 27, 2026.

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

The forecast calls for a high of 69°F and a low of 52°F with a 11% chance of rain.

Historical Weather

Based on 26 years of data

Avg Temp

67°F

L:55° H:68°

RunScore

Conditions

Rain Freq

15%

4 of 26 yrs

Wind7mph

Dew50°F

Temperature History

Range of temperatures during race hours for each year.

Detailed History

Year	Low / High	Rain	Dew Point
2025 Adirondack Marathon Clear conditions throughout the day. 2025	65°/83°	-	60°
2024 Adirondack Marathon Partly cloudy throughout the day. 2024	59°/70°	-	51°
2023 Adirondack Marathon Clearing in the afternoon. 2023	53°/77°	-	56°
2022 Adirondack Marathon Partly cloudy throughout the day with rain. 2022	65°/70°	Light	64°
2019 Adirondack Marathon Partly cloudy throughout the day. 2019	60°/82°	-	59°
2018 Adirondack Marathon Clear conditions throughout the day. 2018	48°/65°	-	44°
2016 Adirondack Marathon Clear conditions throughout the day with late afternoon rain. 2016	48°/62°	-	36°
2015 Adirondack Marathon Clear conditions throughout the day. 2015	54°/71°	-	44°
2014 Adirondack Marathon Clearing in the afternoon. 2014	61°/80°	-	60°
2013 Adirondack Marathon Partly cloudy throughout the day with a chance of rain throughout the day. 2013	56°/59°	Light	49°
2012 Adirondack Marathon Partly cloudy throughout the day with rain clearing later. 2012	52°/60°	Light	42°
2011 Adirondack Marathon Clearing in the afternoon. 2011	63°/76°	-	61°
2010 Adirondack Marathon Partly cloudy throughout the day with a chance of rain throughout the day. 2010	54°/66°	Light	50°
2009 Adirondack Marathon Clear conditions throughout the day. 2009	43°/67°	-	42°
2008 Adirondack Marathon Partly cloudy throughout the day with early morning rain. 2008	54°/61°	-	52°
2007 Adirondack Marathon Becoming cloudy in the afternoon. 2007	48°/59°	-	38°
2006 Adirondack Marathon Partly cloudy throughout the day. 2006	60°/72°	-	59°
2005 Adirondack Marathon Partly cloudy throughout the day. 2005	55°/62°	-	53°
2004 Adirondack Marathon Clear conditions throughout the day. 2004	57°/70°	-	47°
2003 Adirondack Marathon Cloudy skies throughout the day. 2003	55°/60°	-	54°
2002 Adirondack Marathon Partly cloudy throughout the day. 2002	65°/70°	-	66°
2001 Adirondack Marathon Partly cloudy throughout the day. 2001	59°/71°	-	58°
2000 Adirondack Marathon Partly cloudy throughout the day. 2000	47°/57°	-	49°
1999 Adirondack Marathon Clear conditions throughout the day. 1999	44°/66°	-	43°
1998 Adirondack Marathon Partly cloudy throughout the day. 1998	66°/79°	-	65°
1997 Adirondack Marathon Partly cloudy throughout the day. 1997	41°/59°	-	37°