The logging boom that swept over most of the mountains and forests of Pennsylvania drastically altered the landscape surrounding Blue Knob State Park. The old-growth forests of hemlock were clear cut. The timber was hauled away on trains that climbed the steep hillsides. A railroad that followed Bobs Creek used six switchbacks to ascend the mountain. Another railroad used five switchbacks to climb the hills near Wallacks Branch. These railroad grades are still used today to gain access to State Gamelands. The train tracks have since been removed and replaced with hiking trails.