Karst mountain biking Vietnam offers an exhilarating adventure through some of the world’s most dramatic limestone landscapes, where jagged peaks, hidden caves, and lush valleys create a cyclist’s paradise. From the rugged trails of the Ha Giang Loop to the rolling karst hills of Cao Bằng and the cave-strewn paths of Phong Nha

Cycling from Cao Bằng to Lạng Sơn is an exhilarating journey through Northern Vietnam’s rugged mountains, lush valleys, and vibrant ethnic communities. This 120–150 km route connects two border provinces, offering cyclists a mix of challenging climbs