The national park is roughly circular with an average diameter of about 50 kilometres (31.07 mi). It has no marked trails, no accommodations, and only two bridges aside from those in the vicinity of its borders. The area is among the most rainy in Sweden, making hiking dependent on weather conditions. It is also not uncommon to encounter streams that are turbulent and dangerous to wade across without proper experience.
The delta of the Rapa River is considered one of Europe’s prettiest, and the summit of mount Skierffe(sv) offers an overlook of this ice-covered glacial trough valley.
Most notably, the national park houses a number of mountains of over 2,000 metres (6,600 ft). Six of Sweden’s 13 peaks over 2,000 metres are located inside the boundaries of the national park. The second highest mountain in Sweden, Sarektjåkkå is located in the park, whilst the massif Ahkka is located just outside. When it is included in geographical Sarek, the number of 2,000 metre peaks within the Sarek mountain area is eight. The park also houses around 200 peaks that reach 1,800 metres (5,900 ft) or higher. Due to the long trek, the mountains are seldom climbed.
At 1,800 metres above sea-level lies the Pårte(sv) observatory, built in the early 1900s due to the efforts of Axel Hamberg. The construction material had to be carried up manually.
There are around 100 glaciers in Sarek National Park. Together with a few other national parks in Sweden, Sarek National Park is the oldest national park in Europe (1909–1910).
