Pallas-Yllästunturi National Park is the third-largest national park in Finland, located in the Lapland region, in the municipalities of Enontekiö, Kittilä, Kolari and Muonio. It was formally established in 2005, when Pallas-Ounastunturi National Park was joined with Ylläs-Aakenus protected area. It is the third largest national park in Finland, covering 1,020 square kilometres (394 sq mi).
The high fells of the park are the southernmost place to see some arctic species in Finland. There are almost 100 kilometres (60 mi) of fell chain in the National Park. The highest fell in this chain is Taivaskero, which is 807 metres (2,648 ft) high. Most of the park consists of primeval forests and various types of muskeg.
Pallas-Yllästunturi National Park has around 350 kilometres (220 mi) of marked hiking trails. There are several nature trails in the National Park, which are not very demanding and have information boards on the area’s natural features and culture. There are many options for day trips. The most popular hiking trail in Pallas-Yllästunturi National Park is the Hetta–Pallas Trail, which is 55 kilometres (34 mi) long. There are 14 nature trails in the National Park, of which 8 are in the Ylläs area, 4 in the Pallas area, and 2 are in the Ounastunturi Fells area.