At the heart of the alpine region of the reserve is the Norra Storfjället mountain range. This mountain range includes the highest peaks, including Norra Sytertoppen, which from its height of 1,768 m is the highest point of the reserve as well as Västerbotten County. Other notable peaks of the mountain range are Måskostjakke (1,690 m) and Södra Sytertoppen (1685 m). The mountain range is cut down the middle by the narrow, deep valley of Syterskalet/Viterskalet, which is one of the icons of the reserve and is sometimes compared to the famous Lapporten by its symmetrical profile.