Mae Charim National Park, also known as Mae Jarim, is a protected area in the Luang Prabang Range, Nan Province, Northern Thailand. The Wa River, a popular river for white water rafting between July and December, flows through the park area. The park was established on 6 July 2007 with an area of 270,000 rai~ 432 square kilometres. Mae Charim National Park is part of the Luang Prabang montane rain forests ecoregion. 1,652 m high Doi Khun Lan is the highest peak within the park perimeter.