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Trail running in winter is no ordinary feat. Brutal cold, treacherous terrain, and sheer distance make winter trail races some of the toughest endurance events on Earth. For runners seeking the ultimate challenge, conquering one of these races means pushing human limits in the planet’s harshest environments. Here are the world’s top 7 most difficult winter trail races every ultra runner and adventure seeker should know about: 1. Montane Spine Race (UK & Sweden) The legendary Montane Spine Race, often called “Britain’s Most Brutal,” covers the entire length of the Pennine Way in the UK in the heart of winter. Participants face over 268 miles (431km) of icy mountain paths, relentless winds, and unpredictable weather. The new Arctic Spine Race in Sweden tackles the famed King’s Trail in the wilds of Lapland, adding further sub-zero adventures to the race portfolio. This non-stop, expedition-style race is a true test of both physical and mental endurance. 2. The Last Desert Antarctica The Last Desert Antarctica is the only multi-stage ultramarathon held on the coldest continent. Runners must complete 250 kilometers across the stunning, frozen wilderness of

The Trail Santiago Pontones 2025 is not just another event on the Spanish calendar; it is a true journey into the wilderness. Every October, this ultra trail takes place in the rugged mountains of Andalusia, inside the Parque Natural de las Sierras de Cazorla, Segura y Las Villas. What makes it unique is not only the technical terrain but also the feeling of isolation that accompanies every step. For trail runners who dream of testing themselves in raw, untamed nature, Santiago Pontones is the race that defines purity. From steep climbs and rocky descents to long stretches of solitude, this event demands more than physical strength—it calls for resilience, planning, and respect for the mountains. The setting: Sierras de Cazorla, Segura y Las Villas Running