The 2026 Summit Run 5K has concluded.

Summit Run 5K

Race complete

Hadley, MA, USA · September 20, 2026

58°·59° high·Light·Light rain

Race Day Weather

58°at start

60° high

Light

Light rain

Cool, light rain, manageable conditions

Runners will face temperatures ranging from 57°F to 60°F, with high humidity at 89%. Light rain will persist throughout the race, but it should not significantly impact performance. A headwind will challenge runners from miles 1-7 and 21-22, while a beneficial tailwind will assist from miles 9-13 and 23-27, making pacing adjustments essential during the tougher segments.

7 AM

8 AM

9 AM

10 AM

11 AM

12 PM

1 PM

2 PM

3 PM

4 PM

5 PM

6 PM

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Race Info

The Summit Run 5K climbs from Mountain Road in Hadley, Massachusetts, to the summit of Mount Holyoke inside Skinner State Park, passing the Hockanum Village turnaround near the one-mile mark before the final climb up a paved park road to the summit house, with views over the Connecticut River valley. The course was rerouted in 2025 to drop a stretch along Route 47. The race runs each September.

Website

FAQ

When is the 2026 Summit Run 5K?

The 2026 Summit Run 5K will be held on Sunday September 20, 2026.

What will the weather be like for the 2026 Summit Run 5K?

The forecast calls for a high of 60°F and a low of 54°F with a 100% chance of rain.

Historical Weather

Based on 17 years of data

Avg Temp

64°F

L:59° H:69°

RunScore

Conditions

Rain Freq

12%

2 of 17 yrs

Wind7mph

Dew52°F

Temperature History

Range of temperatures during race hours for each year.

Detailed History

Year	Low / High	Rain	Dew Point
2025 Summit Run 5K Partly cloudy throughout the day. 2025	51°/67°	-	45°
2024 Summit Run 5K Partly cloudy throughout the day. 2024	59°/70°	-	52°
2023 Summit Run 5K Cloudy skies throughout the day with rain. 2023	55°/58°	Light	54°
2022 Summit Run 5K Clear conditions throughout the day. 2022	52°/65°	-	36°
2021 Summit Run 5K Partly cloudy throughout the day. 2021	54°/72°	-	54°
2019 Summit Run 5K Partly cloudy throughout the day. 2019	66°/72°	-	50°
2018 Summit Run 5K Partly cloudy throughout the day. 2018	51°/59°	-	48°
2017 Summit Run 5K Clearing in the afternoon with late afternoon rain. 2017	64°/79°	-	67°
2016 Summit Run 5K Clear conditions throughout the day. 2016	49°/64°	-	36°
2015 Summit Run 5K Clearing in the afternoon. 2015	67°/72°	-	52°
2014 Summit Run 5K Cloudy skies throughout the day with rain clearing later. 2014	63°/73°	Light	64°
2013 Summit Run 5K Partly cloudy throughout the day with rain clearing later. 2013	61°/66°	-	51°
2011 Summit Run 5K Partly cloudy throughout the day. 2011	61°/69°	-	52°
2010 Summit Run 5K Partly cloudy throughout the day. 2010	58°/64°	-	52°
2009 Summit Run 5K Partly cloudy throughout the day with early morning rain. 2009	67°/77°	-	63°
2002 Summit Run 5K Partly cloudy throughout the day. 2002	72°/82°	-	67°
1999 Summit Run 5K Clear conditions throughout the day with early morning rain. 1999	52°/70°	-	48°

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