Doi Luang National Park (Thai: อุทยานแห่งชาติดอยหลวง) is one of the biggest national parks in Northern Thailand. It covers the Mae Suai, Phan and Wiang Pa Pao districts of Chiang Rai Province, Wang Nuea and Ngao of Lampang Province as well as Mae Chai and Mueang Phayao of Phayao Province.