Shrouded in the shadows of the mightiest of mountain ranges, the serene Tsum Valley is a far cry from the sensory overload of Kathmandu’s sprawling metropolis. Concealed on the border with Tibet in the Bouda range of the Nepalese Himalaya, this holy, hidden valley’s sheer inaccessibility has left it off the map for decades. Known as the Beyul Kyimolung, its long trodden pilgrimage trails, rustic villages, monasteries and fluttering prayer flags present an awe-inspiring backdrop for a mammoth mountain-biking adventure. Strong legs at the ready, this is the two-wheeled pilgrimage you didn’t know deserved a spot on your ultimate adventure bucket list.