Doi Khun Tan National Park

Doi Khun Tan National Park is a forested mountain park straddling Lamphun and Lampang provinces in northern Thailand, centered in Mae Tha District, Lamphun. Established in 1975 as Thailand's 10th national park, it covers about 255 square kilometers of pine and mixed deciduous forest along the Khun Tan Range. Notable for its accessible hiking trails, camping areas, and the historic Khun Tan railway tunnel, it offers cool mountain scenery and biodiversity near Chiang Mai and Lampang.

Visitors can expect a cool, forested mountain environment on the Khun Tan Range with pine forests, mixed deciduous woodland and mountain ridges. The park has a visitor centre, marked hiking trails to four summit levels (Yor 1 to Yor 4, highest at 1,363m), viewpoints, campsites and bungalows. The Khun Tan Railway Station and Thailand's longest railway tunnel lie within the park boundary. Activities focus on day hiking, nature walking, birdwatching, photography and overnight camping.

Established in 1975 as Thailand's 10th national park, covering approximately 255.29 square kilometers of the Khun Tan Range. The park includes the historic Khun Tan Tunnel, constructed between 1907 and 1918 under German engineer Emil Eisenhofer, which at 1,352 meters is Thailand's longest railway tunnel and was a major engineering achievement for the Northern Railway Line.

The park lies in the traditional Lanna region and is valued for forest conservation, watershed protection and outdoor recreation. The railway tunnel and station are cultural landmarks reflecting early 20th-century railway heritage and remain in active use, connecting northern communities.