The annual UTMB, the flagship race of the Ultra-Trail du Mont-Blanc week, kicked off on Friday with 2,500 participants. As the race continues to attract more runners each year, local residents are increasingly concerned about its environmental impact.
The annual UTMB, the flagship race of the Ultra-Trail du Mont-Blanc week, kicked off on Friday with 2,500 participants. As the race continues to attract more runners each year, local residents are increasingly concerned about its environmental impact.
