Completed the Penobscot Trail, the mountain loop, at the Acadia State Park! It is about 5.2 miles. This is an intermediate hike. There were side of cliffs we held onto and walked tightly across, rungs to hold tightly and make it onto the next step of the trail, and high footstep bridges to walk across. I recommend hiking shoes to keep your ankles and feet protected and balanced. The view is gorgeous at the top!