Tunnel Hill Marathon

Vienna, IL, USA · November 14, 2026

40°·57° high·Light·Dry

Weather

Race Day Weather

40°at start

57° high

Light

Dry

Cool temps, light winds ahead

Runners will face a temperature rise from 40°F to 57°F during the race, with light winds from the SSW at 7 mph. Humidity levels around 61% will keep conditions comfortable, but caution is advised due to a light chance of rain. Runners should maintain a steady pace and consider hydration strategies as temperatures increase.

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Distance: 26.2mi

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Race Info

Tunnel Hill Marathon is the shortest of four distances (100 mile, 100 km, 50 mile, and marathon) run together each November on the Tunnel Hill State Trail, a crushed-limestone rail-trail out of Vienna, Illinois that passes through a historic railroad tunnel. The course holds between 340 and 680 feet of elevation with a grade under 2 percent, and the event has produced multiple USATF and world records at the 50-mile and 100-mile distances, including Caitriona Jennings' 12:37:04 100-mile world record set in 2025. The marathon serves as a Boston-qualifying option for runners who want a shorter distance than the ultra events held the same day.

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FAQ

When is the 2026 Tunnel Hill Marathon?

The 2026 Tunnel Hill Marathon will be held on Saturday November 14, 2026.

Is the Tunnel Hill Marathon a Boston Marathon Qualifier?

Yes, the Tunnel Hill Marathon is an official Boston Marathon qualifier.

What is the time limit for the Tunnel Hill Marathon?

The time limit for the Tunnel Hill Marathon is 12 hours.

What will the weather be like for the 2026 Tunnel Hill Marathon?

The forecast calls for a high of 59°F and a low of 42°F with a 10% chance of rain.

Historical Weather

Based on 9 years of data

Avg Temp

49°F

L:42° H:57°

RunScore

Conditions

Rain Freq

56%

5 of 9 yrs

Wind5mph

Dew38°F

Temperature History

Range of temperatures during race hours for each year.

Detailed History

Year	Low / High	Rain	Dew Point
2025 Tunnel Hill Marathon Partly cloudy throughout the day with morning rain. 2025	35°/44°	Light	26°
2025 Tunnel Hill Marathon Partly cloudy throughout the day. 2025	44°/70°	-	45°
2024 Tunnel Hill Marathon Partly cloudy throughout the day with a chance of rain throughout the day. 2024	63°/74°	Light	59°
2024 Tunnel Hill Marathon Partly cloudy throughout the day with late afternoon rain. 2024	54°/61°	Light	50°
2023 Tunnel Hill Marathon Clear conditions throughout the day. 2023	40°/65°	-	33°
2023 Tunnel Hill Marathon Clear conditions throughout the day. 2023	36°/58°	-	33°
2022 Tunnel Hill Marathon Cloudy skies throughout the day with rain or snow clearing later. 2022	30°/33°	Light	24°
2021 Tunnel Hill Marathon Partly cloudy throughout the day. 2021	33°/44°	-	27°
2020 Tunnel Hill Marathon Partly cloudy throughout the day with a chance of rain throughout the day. 2020	42°/64°	Light	45°

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