The best hiking in this area, at least for experienced and well-kitted trekkers, is in Sarek National Park. Full of sharp peaks and huge glaciers, its largest valley, Rapadalen, is lush with birch and willow trees. The Kungsleden trail dips briefly into Sarek, at the southeastern corner of the park. Trekking here is certainly not for the casual walker, and hikers must be prepared for very rugged conditions. Major trails are often washed out or in poor repair, and the extremes of terrain make for volatile weather conditions. There are no tourist facilities within the park, so be sure to check with an STF lodge or the National Park office before setting out.