Kielder Marathon

Northumberland, England, UK · October 3, 2027

49°·53° high·Breezy·Rain possible

Weather

Kielder Marathon race day weather

49°at start

53° high

Breezy

Rain possible

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Cool temps, moderate winds

Runners will face a temperature trend from 49°F at the start to 53°F at the finish. Winds from the SSW will peak at 12 mph, contributing to a challenging race environment. With humidity at 82%, runners should adjust their pace conservatively and stay hydrated throughout the race.

Race day forecast available in 313 days

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Distance: 26.2mi

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About the Kielder Marathon

The Kielder Marathon runs almost entirely off-road on trails around Kielder Water in Northumberland, England, the largest man-made lake in Northern Europe by capacity. The course follows the Lakeside Way through Kielder Forest, England's largest working forest. The race weekend also includes a half marathon, 10K, gravel duathlon, and junior races around the reservoir.

Website

Race weekend

Saturday, October 2

1:00 PM10K (6.2 mi)

1:00 PMGravel Duathlon (31.3 mi)

Sunday, October 3

10:15 AMHalf Marathon (13.1 mi)

10:45 AMJunior Osprey Run (0.9 mi)

10:45 AMJunior Falcon Run (1.6 mi)

Course Map

Kielder Marathon FAQ

When is the 2027 Kielder Marathon?

The 2027 Kielder Marathon will be held on Sunday October 3, 2027.

What is the time limit for the Kielder Marathon?

The time limit for the Kielder Marathon is 7 hours.

What will the weather be like for the 2027 Kielder Marathon?

The forecast calls for a high of 55°F and a low of 44°F with a 17% chance of rain.

What is the weather usually like for the Kielder Marathon?

Over the 10 years racecast.io has race-day weather for (2014 to 2026), it averaged 49°F at the start and 55°F by a typical finish. Rain fell during race hours in 5 of those years.

What was the hottest Kielder Marathon?

Of the 10 years on record, 2023 was the warmest, reaching 60°F during race hours. The coldest start was 2015, at 45°F.

What was the windiest Kielder Marathon?

Of the 10 years on record, 2025 was the windiest, with wind averaging 22 mph during race hours. The calmest was 2023, at 4 mph.

Kielder Marathon weather history

Based on 10 years of data

Avg Temp

53°F

L:49° H:55°

RunScore

Conditions

Rain Freq

50%

5 of 10 yrs

Wind10mph

Dew47°F

Temperature History

Range of temperatures during race hours for each year.

Detailed History

Year	Low / High	Rain	Dew Point
2026 Kielder Marathon Partly cloudy throughout the day. 2026	50°/57°	-	50°
2025 Kielder Marathon Partly cloudy throughout the day. 2025	51°/55°	-	41°
2024 Kielder Marathon Cloudy skies throughout the day with rain. 2024	51°/56°	Light	48°
2023 Kielder Marathon Partly cloudy throughout the day with early morning rain. 2023	52°/60°	Light	54°
2022 Kielder Marathon Partly cloudy throughout the day with morning rain. 2022	53°/58°	-	47°
2021 Kielder Marathon Partly cloudy throughout the day with rain. 2021	47°/52°	Light	47°
2019 Kielder Marathon Partly cloudy throughout the day with rain. 2019	48°/53°	Light	45°
2017 Kielder Marathon Partly cloudy throughout the day. 2017	52°/58°	-	49°
2015 Kielder Marathon Partly cloudy throughout the day. 2015	45°/51°	-	43°
2014 Kielder Marathon Partly cloudy throughout the day with afternoon rain. 2014	47°/54°	Light	46°