Blue Knob is a Pennsylvania summit with a broad dome that is the most northern of the 3,000 footers in the range of Allegheny Mountains. The mountain is the site of 5,874-acre (23.77 km²) Blue Knob State Park and contains approximately 18 miles (29 km) of hiking trails and numerous overlooks. A ski area is located on the mountain's north slopes. The towns of Johnstown, Altoona and Bedford are located within 25 miles (40 km) of the mountain.