Phu Miang—Phu Thong forest in the area of Chat Trakan District, Phitsanulok Province and Nam Pat District, Uttaradit Province was declared a wildlife sanctuary, which was publized in the
Government Gazette, volume 94, issue 137, dated December 31, 1977.
Royal Forest Department extended the wildlife sanctuary with
Bo Thong Subdistrict, Thong Saen Khan Minordistrict, Uttaradit Province, proclaimed in the Government Gazette, volume 106, issue 157, dated September 20, 1989. In 1992 the wildlife sanctuary was extended again, this time with
Pa Daeng Subdistrict, Chat Trakan District, Phitsanulok Province, which was announced in the Government Gazette, volume 109, issue 42, dated April 8, 1992. Since 2002 this wildlife sanctuary has been managed by
Protected Areas Regional Office 11 (Phitsanulok). ==Flora==