The relief of Pirin National Park is alpine and highly fragmented and is characterized with steep slopes, high ridges and deep river valleys. The highest point is Vihren at an altitude of 2914 m, the second highest summit in Bulgaria and the third one in the Balkan Peninsula, while the lowest altitude in the park is at 950 m near Bansko. Nearly 60% of the park's area is situated above 2000 m. The distribution of the territory of the park by altitude is as follows: up to 1000 m - 1.64 km2 (0.4%), 1000-1600 m - 51.09 km2 (12.7%); 1600-2000 m - 121.08 km2 (30.0%); 2000-2500 m - 198.31 km2 (49.1%); above 2500 m - 31.45 km2 (7.8%). The inclination of the park's territory is steep — more than 90% the total area is classified as steep (21-30°) or very steep (above 31°).