Rising to 1894’ above sea level and 1300’ above the Hoosic River, Pine Cobble forms the southwest abutment of East Mountain, which in turn blends into the Green Mountains to the north. The quartzite and schist bedrock is covered with a diversity of glacial and post-glacial lake (below the 1000’ contour) sediments with a tendency toward being well- to excessively-drained. The diversity of plant communities on Pine Cobble is probably greater than any comparable hillside in the region. At the base of hill is riparian forest and wetlands associated with the Hoosic River. These rapidly are replaced uphill by northern hardwood communities dominated by sugar maple. As one moves uphill, the west-facing slopes posses an increasingly warm microclimate which results in first white and black oaks, and then chestnut oak and sassafras to occur with increasing frequency. Halfway up Pine Cobble there is an abrupt change in steepness marked by Bear Spring (with its dense stand of eastern hemlock) and the “slides” on which pitch pine and other fire adapted species dominate.