LZT1005665: Mount Holyoke, from the Connecticut River. Mount Holyoke, a Traprock Mountain, Elevation, is the Western-Most Peak of the Holyoke Range and Part of the 100-Mile (160 Km) Metacomet Ridge. The Mountain is Located in the Connecticut River Valley of Western Massachusetts. USA, Woodward, John Douglas (1846-1924) / Bridgeman Images