A Pa Chai Westernmost Point

A Pa Chai Westernmost Point is the westernmost point of Vietnam, located at the tri-border junction of Vietnam, Laos and China in Sin Thau Commune, Muong Nhe District, Dien Bien Province. Marked by a granite border pillar (Moc 0), it sits on Khoang La San mountain at about 1,864 meters elevation. The site is notable as a national sovereignty landmark and a remote trekking destination offering panoramic mountain views near the border.

Visitors can expect a remote mountain setting on Khoang La San requiring a guided trek from A Pa Chai village to the granite tri-border marker (Moc 0) inscribed with three countries. The route includes concrete stairs and steep forest paths, with panoramic views of forested mountains at the border junction. Access is controlled by the Muong Nhe Border Guard station; visitors register, are escorted by border guards and local guides, and can view and photograph the marker and surrounding landscape.

The marker denotes the westernmost extremity of Vietnamese territory and the tripoint where the borders of Vietnam, Laos and China meet on Khoang La San. The granite pillar was erected following border demarcation and delimitation agreements and serves as a sovereignty and boundary landmark.

The site is a symbolic national landmark representing territorial sovereignty and is a significant destination for domestic visitors to mark their presence at the westernmost point of the country. It is located in an area inhabited by Ha Nhi and other ethnic communities.