Chiaksan National Park, National park in Gangwon-do, South Korea.

Chiaksan National Park covers 186 square kilometres of mountain terrain split between Wonju and Hoengseong County in Gangwon-do, centred on the 1,288-metre Chiaksan. It was designated the country's 16th national park on 31 December 1984, after having been a provincial park since 15 March 1973. The park office has been run by the Korea National Park Service since 1987.

The area became a national park in 1984 as the sixteenth protected park in South Korea's conservation system. This designation helped safeguard the landscape and its wildlife for future generations.

The name Chiaksan means "Pheasant Peak Mountain", from a myth in which a man saved a pheasant from being eaten by a snake; the mountain was formerly called Jeokakasan. The park covers about 186 square kilometres across Wonju and Hoengseong County in Gangwon-do, and was first protected as a provincial park on 15 March 1973 before becoming a national park on 31 December 1984.

Bring proper hiking boots and weather-appropriate clothing, as mountain slopes can be slippery and conditions change quickly. Information centers throughout the park offer maps and updates on trail accessibility, helping visitors plan safe routes.

The park shelters rare animal species like flying squirrels and certain bat species that survive in few other Korean locations. These creatures thrive in the old-growth forests, making the area an important refuge for animals at risk.