Dyfnant Forest is a remote forest in northeastern-central Powys, Wales.
Dyfnant Forest lies to the west of the B4395 road, a road which stems north from the A458 road and is between the valleys of the Afon Twrch to the west and the Afon Efyrnwy to the east, north of the village of Llangadfan. It is described by Lonely Planet as being "where a well-signposted maze of forestry tracks culminates in one enormous hill before descending rather spectacularly toward Lake Vyrnwy" (five miles away). Dyfnant Forest has an area of 2,430 hectares (6,000 acres) located at the periphery of the Cambrian Mountains, just south of Lake Vyrnwy.
The original forest was planted by the Forestry Commission. It is approached from a country road from Llangadfan, which branches into a 2.5 kilometres (1.6 mi) foot track. It is well served by 64 kilometres (40 mi) of forest tracks. The forest tracks include the Rainbow Trails, which were established by a partnership between Forestry Commission Wales and the Dyfnant and Fyrnwy Horse Riders' & Carriage Drivers' Association; set in peaceful forest environment the trails consist of five horse-riding trails.
The forest is a large predominately coniferous working forest with pockets of native deciduous trees. The forest has rich growth of mixed plantation comprising conifers such as cypress, western red cedar, lodgepole pine, Douglas fir, Norway spruce and grand fir, as well as from deciduous trees.