42.195 km
Distance
1,850 m
Elevation Gain
5:15:00
Average Finish Time
1,200
Total Finishers
1982
Established
Mountainous
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Course & Elevation
One of the most challenging marathons in the UK, featuring five significant climbs through the heart of Snowdonia National Park. The route traverses slate mining towns, remote valleys, and stunning mountain scenery, with the highest point near Pen-y-Pass offering panoramic views of Snowdon and surrounding peaks.
🌤️ Weather
Cool, wet Welsh weather is typical with frequent rain showers and strong winds expected. Runners should prepare for changeable conditions and muddy sections.
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🎯 Fun Facts
- ▸ Established in 1982, making it one of Britain's oldest continuously held marathons
- ▸ The route climbs over 6,000 feet of elevation—equivalent to scaling Snowdon twice
- ▸ Llanberis is home to the UK's only rack railway, which climbs to Snowdon's summit at 1,085m
- ▸ Approximately 18% of runners do not finish due to the severe mountainous terrain and weather conditions
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