Marathon Eryri (Snowdonia Marathon)
Race Day Weather
Cool and wet, adjust for winds
Runners will face cool temperatures starting at 46°F, remaining steady throughout the race. Wind speeds will peak at 19 mph with gusts up to 37 mph, becoming a headwind from miles 14 to 22. With a light rain expected, hydration will be crucial, especially on the hilly terrain, particularly during climbs at miles 3-5 and 23-24. Runners should adjust their pacing strategy to account for the challenging conditions.
Pace Calculator
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
FAQ
When is the 2025 Marathon Eryri (Snowdonia Marathon)?
What will the weather be like for the 2025 Marathon Eryri (Snowdonia Marathon)?
Historical Weather
Temperature History
Range of temperatures during race hours for each year.
