The middle parts of the National Park are dominated by the most impressive scenery of the park: over 70 km long Lemmenjoki River surrounded with Maarestatunturi and Viipustunturi Fells. The slopes of the valley of Lemmenjoki River are covered in unique old-growth Pine (Pinus sylvestris) forests.
Rivers Kietsimäjokiand Vaskojoki runs in the northern and north-western parts of the park. The landscape has clear northern character. In the pine forests of the rivervalleys, there are plenty of typical lappish short and wide old pine trees, called 'aihki'.
Rugged Fell Landscape
Above the river valleys, the pine forests gradually give way to birch forests, and up at the rugged felltops the ground is bare. There you can see the harsh conditions of the northern climate. However, not even the highest summits are lifeless, you can spot for example the rare bird of the fells, the Rock Ptarmigan (Lagopus mutus). It is worth climbing up for the great scenery, because when the weather is good, it is possible to see over distance of tens of kilometres.
Also large mires form an essential part of the National Park's landscape. Some of them are impassable quagmires. In the southern Repokaira area, there are open aapa mires, and the northern limit of the Spruce (Picea abies) forests also crosses Repokaira. On the mires of the northern part of the park, you can see turf-covered frostmounds called 'palsa' in Finnish.
Rare Plant and Animal Species
The threatened plant species of Lemmenjoki National Park include the Arnica (Arnica angustifolia), the Marsh Saxifrage (Saxifraga hirculus), the Hudson Bay Sedge (Carex heleonastes), the Boreal Moonwort (Botrychium boreale), the Lance-Leaved Moonwort (Botrychium lanceolatum), the Oak Fern (Gymnocarpium continentale), the Stickseed (Lappula deflexa), the Meadow-rue (Thalictrum minus ssp. kemense) and the Moonwort Grape Fern (Botrychium lunaria). Rare plants found in the area are also the Black Sedge (Carex atrata), the Moss Campion (Silene acaulis) and the Alpine Lady's Mantle (Alchemilla alpina). Rare animals can also be seen in the Park, such as Wolverines (Gulo gulo) and occasionally Wolves. (Canis lupus).