Longwanqun National Forest Park is a nationally protected nature area in Huinan County, Jilin, China. Geographically, it is part of the western Changbai Mountains. A notable feature of the park are a group of volcanic crater lakes: the Sanjiaolong Crater Lake, Dalong Crater Lake, Erlong Crater Lake, Xiaolong Crater Lake, Donglong Crater Lake, Nanlong Crater Lake, Hanlong Crater Lake. The park is located in the Manchurian mixed forests ecoregion.