Seneca Creek Greenway Trail Marathon

Gaithersburg, MD, USA · March 6, 2027

34°·48° high·Breezy·Dry

Weather

Race Day Weather

34°at start

48° high

Breezy

Dry

Cold start, gradual warm-up

Runners will face a start-line temperature of 34°F, feeling as low as 29°F in the pre-race period. Temperatures will gradually rise to 48°F by the finish, with light winds from the WSW at 8 mph. With humidity at 52%, no major adjustments are needed, but runners should consider layered gear for the wait.

Race day forecast available in 123 days

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Distance: 26.2mi

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0:00:00

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Race Info

In this race, you will experience some of Montgomery County's finest single-track trails as you meander along beautiful Seneca Creek in Seneca State Park. This scenic trail is muddy, rocky, rooty, hilly and steep in sections with no major elevation gain/loss. This is a challenging, but beautiful run for all!

The Seneca Creek Greenway Trail Marathon and 50K is a low-key, low-priced and fun filled event along the beautiful Seneca Creek Greenway Trail and parallel trails. Marathon and 50K participants will have the option to choose their final distance when returning to the finish (either stop for the "marathon" or keep going for the 50K. Source

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Course Map

FAQ

When is the 2027 Seneca Creek Greenway Trail Marathon?

The 2027 Seneca Creek Greenway Trail Marathon will be held on Saturday March 6, 2027.

Is the Seneca Creek Greenway Trail Marathon a Boston Marathon Qualifier?

No, the Seneca Creek Greenway Trail Marathon is NOT a Boston Marathon qualifier.

What is the time limit for the Seneca Creek Greenway Trail Marathon?

The time limit for the Seneca Creek Greenway Trail Marathon is 9.75 hours.

What will the weather be like for the 2027 Seneca Creek Greenway Trail Marathon?

The forecast calls for a high of 55°F and a low of 36°F with a 8% chance of rain. Check our detailed hourly forecast above for the best marathon race plan.

Historical Weather

Based on 22 years of data

Avg Temp

50°F

L:38° H:52°

RunScore

Conditions

Rain Freq

18%

4 of 22 yrs

Wind10mph

Dew28°F

Temperature History

Range of temperatures during race hours for each year.

Detailed History

Year	Low / High	Rain	Dew Point
2026 Seneca Creek Greenway Trail Marathon Partly cloudy throughout the day. 2026	42°/59°	-	48°
2025 Seneca Creek Greenway Trail Marathon Partly cloudy throughout the day. 2025	43°/48°	-	23°
2024 Seneca Creek Greenway Trail Marathon Cloudy skies throughout the day with rain. 2024	40°/48°	Light	43°
2023 Seneca Creek Greenway Trail Marathon Cloudy skies throughout the day. 2023	36°/45°	-	26°
2021 Seneca Creek Greenway Trail Marathon Clear conditions throughout the day. 2021	42°/57°	-	11°
2020 Seneca Creek Greenway Trail Marathon Clearing in the afternoon. 2020	37°/49°	-	18°
2019 Seneca Creek Greenway Trail Marathon Cloudy skies throughout the day with early morning snow or rain. 2019	32°/43°	-	34°
2018 Seneca Creek Greenway Trail Marathon Clear conditions throughout the day. 2018	34°/49°	-	25°
2017 Seneca Creek Greenway Trail Marathon Clear conditions throughout the day. 2017	28°/39°	-	10°
2016 Seneca Creek Greenway Trail Marathon Partly cloudy throughout the day. 2016	33°/42°	-	21°
2015 Seneca Creek Greenway Trail Marathon Partly cloudy throughout the day. 2015	32°/59°	Light	36°
2014 Seneca Creek Greenway Trail Marathon Clear conditions throughout the day. 2014	34°/60°	-	34°
2013 Seneca Creek Greenway Trail Marathon Partly cloudy throughout the day. 2013	30°/36°	-	20°
2012 Seneca Creek Greenway Trail Marathon Clearing in the afternoon with rain clearing later. 2012	46°/58°	Light	33°
2011 Seneca Creek Greenway Trail Marathon Partly cloudy throughout the day. 2011	45°/63°	-	44°
2010 Seneca Creek Greenway Trail Marathon Clear conditions throughout the day. 2010	32°/50°	-	14°
2009 Seneca Creek Greenway Trail Marathon Clearing in the afternoon. 2009	56°/72°	-	49°
2008 Seneca Creek Greenway Trail Marathon Partly cloudy throughout the day. 2008	40°/45°	-	20°
2007 Seneca Creek Greenway Trail Marathon Partly cloudy throughout the day. 2007	37°/57°	-	28°
2006 Seneca Creek Greenway Trail Marathon Clear conditions throughout the day. 2006	30°/46°	-	17°
2005 Seneca Creek Greenway Trail Marathon Partly cloudy throughout the day. 2005	34°/44°	-	20°
2004 Seneca Creek Greenway Trail Marathon Partly cloudy throughout the day with a chance of rain throughout the day. 2004	59°/69°	Light	57°

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