Petersburg Pass is the low point (2067’) on the crest of the Taconic Range between Petersburg Mountain (sometimes called Mt. Raimer) at 2560’ on the south and White Rocks (2350’) in the Hopkins Memorial Forest on the north. The site was used as a transportation corridor, woodlots, tourist attraction, ski area, and even briefly a road house in the 19th and 20th centuries. The New York State Department of Environmental Conservation (DEC) which manages the southern portion of the Petersburg Pass has documented the presence of 46 species of mammals, 74 species of birds, and 31 species of reptiles and amphibians found on the Taconic Crest near the Pass. In addition there are diverse plant communities, including a rich spring wildflower flora, that give testament to the varied land use and abrupt changes in microclimate. The winds funnel as they converge through the Pass, which is a favored site to view the fall migrations of hawks and other birds.
The Pass is an ideal location to see the regional geology in a single panorama. To the east in the distance is the Hoosac Range with its schists and granites, while 7 miles across the Hemlock and Green river valleys is the Mt. Greylock massif. On a clear day the Catskills can be seen in the southwest while the Adirondacks may be visible to the northwest.