Cycle the Majestic Mountains of the Tonkinese Alps This is a unforgettable mountain biking adventure through the north-western part of Vietnam where the Tonkinese Alps, or Hoang Lien Mountains, soar skywards, concealing some of Vietnam’s best-kept secrets. Very few tourists have ventured into this secluded part of northern Vietnam, that is mostly inhabited by an eclectic mix of hill tribes, including the H’mong, Dzao, and ethnic White Thai. The region is bordered by Laos on the west and China on the north. It is a region where modern civilizations is arriving slowly. Many methods used by the local hill tribes date back thousands of years, such as the watering of their terraced rice paddies on the mountain sides, and using the power of the same water to crush rice.