Mammutmarsch København 2026-05-02 30km; 42km; 55km Copenhagen / Denmark Visit Event Website → About This Event Location Copenhagen Country Denmark Date 2026-05-02 Distances 30km; 42km; 55km Why This Event 24-hour Copenhagen urban hiking challenge covering 30-55km through Danish capital's streets, parks, and waterfront without running More Runs in Denmark View all runs in Denmark