Marathon Eryri (Snowdonia Marathon)

Llanberis, UK, England • October 25, 2025
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partly-cloudy-day Partly cloudy throughout the day.

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The inaugural Snowdonia Marathon was held in 1982, and was conceived as a dramatic alternative to the numerous city and town races becoming so popular. The demanding and spectacular route, encircling Snowdon, Wales’ and England’s highest peak, has given the event a unique place in the annual marathon calendar ever since. Source

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When is the 2025 Marathon Eryri (Snowdonia Marathon)?

The 2025 Marathon Eryri (Snowdonia Marathon) will be held on Saturday October 25, 2025.

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Every Monday we break down the top results in the marathon from over the weekend.

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2022 Marathon Eryri winners Dan Kashi and Caroline Brock will return to Llanberis next weekend to defend the titles that they won in emphatic style last year.  Marathon Eryri, one of Wales’ most iconic and challenging sporting events, and one of the UK’s greatest marathons, will welcome some 2,800 runners to Llanberis on Saturday the... Read more »

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Historical Weather & Results

RunScore
Run Score: 8
Temp
52°F
Min/Max
51°/54°F
Dew
47°F
Days of Rain
13/14
Wind
22mph
Tap a row for details.
YearLow / HighRainResults

Marathon Eryri (Snowdonia Marathon) 2024 Weather History

Becoming cloudy in the afternoon with rain.

2024
rain
51°/ 55°Light
Run Score: 6

Marathon Eryri (Snowdonia Marathon) 2023 Weather History

Partly cloudy throughout the day with a chance of rain throughout the day.

2023
partly-cloudy-day
53°/ 54°Light
Run Score: 8

Marathon Eryri (Snowdonia Marathon) 2022 Weather History

Partly cloudy throughout the day with rain.

2022
rain
59°/ 63°Light
Run Score: 7

Marathon Eryri (Snowdonia Marathon) 2018 Weather History

Partly cloudy throughout the day with a chance of rain throughout the day.

2018
partly-cloudy-day
42°/ 43°Light
Run Score: 5

Marathon Eryri (Snowdonia Marathon) 2017 Weather History

Partly cloudy throughout the day with afternoon rain.

2017
cloudy
54°/ 55°Light
Run Score: 6

Marathon Eryri (Snowdonia Marathon) 2016 Weather History

Cloudy skies throughout the day with afternoon rain.

2016
cloudy
53°/ 54°Light
Run Score: 8

Marathon Eryri (Snowdonia Marathon) 2015 Weather History

Partly cloudy throughout the day with a chance of rain throughout the day.

2015
partly-cloudy-day
48°/ 50°Light
Run Score: 7

Marathon Eryri (Snowdonia Marathon) 2014 Weather History

Partly cloudy throughout the day with rain in the morning and afternoon.

2014
partly-cloudy-day
53°/ 55°Light
Run Score: 6

Marathon Eryri (Snowdonia Marathon) 2013 Weather History

Partly cloudy throughout the day with a chance of rain throughout the day.

2013
cloudy
54°/ 56°Light
Run Score: 8

Marathon Eryri (Snowdonia Marathon) 2012 Weather History

Partly cloudy throughout the day with morning rain.

2012
partly-cloudy-day
43°/ 45°-
Run Score: 8

Marathon Eryri (Snowdonia Marathon) 2011 Weather History

Partly cloudy throughout the day with rain.

2011
cloudy
51°/ 57°Light
Run Score: 7

Marathon Eryri (Snowdonia Marathon) 2010 Weather History

Partly cloudy throughout the day with a chance of rain throughout the day.

2010
partly-cloudy-day
48°/ 52°Light
Run Score: 6

Marathon Eryri (Snowdonia Marathon) 2009 Weather History

Partly cloudy throughout the day with rain.

2009
wind
55°/ 59°Light
Run Score: 10

Marathon Eryri (Snowdonia Marathon) 2008 Weather History

Partly cloudy throughout the day with rain.

2008
wind
50°/ 52°Light
Run Score: 10
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You Need an Account For That

Setting up a racecast.io account will allow you to start building a reputation in the community. Over time you'll be able to rate races, join the discussion, and post in the community.

Right now we are invite only, you can get on the waitlist by entering your email below:

OR