Chi Lang Pass

Chi Lang Pass is a historic mountain pass in Chi Lang District, Lang Son Province, about 30 km south of Lang Son City on National Route 1A. This 20-km long narrow valley flanked by limestone karst mountains served as a strategic defensive gateway to northern Vietnam. It is notable for decisive Vietnamese victories against invaders and preserves relics such as Quy Mon Quan Gate and memorials.

Visitors can expect a long, narrow valley enclosed by steep limestone karst hills and cliffs along National Route 1A. The site is an open-air historic landscape with roadside monuments, stone steles, Quy Mon Quan relic gate, statues commemorating historic victories, and small exhibition areas. The surroundings are rural with rice fields, villages, and forested slopes. Visitors can walk around monument areas, view interpretive panels, and photograph the dramatic mountain scenery.

Chi Lang Pass has been a strategic military gateway for over a millennium. It was the site of major defensive victories including battles in 981, 1077, 1285 against Mongol-Yuan forces, and the decisive 1427 victory by Lam Son forces led by Le Loi against Ming forces, which led to national independence. The pass retains Quy Mon Quan Gate and steles marking these events.

The pass is regarded as a symbol of Vietnamese resilience and is preserved as a National Historic Relic. It features in folklore, history education, and local festivals commemorating historic victories, with monuments and a museum that convey its cultural memory for visitors.