Whether You do the main 6 mile loop or add the 3 mile out and back to Mary's Rock this is a pretty strenuous hike. It features a 200 foot gain in elevation for the short version and almost 2400 feet for the long version. All of this gain is accomplished over the first half of the hike. The climb is made somewhat more bearable by the use of switchbacks but it is still quite a workout. The main route is only slightly used but even on a clear day in winter traffic lights should be installed for the side trip to Mary's Rock. Even with the heavy foot traffic the views may be worth it. More views can be had, especially in winter when the leaves are off, on the trek along Buck Ridge.