Mount Tom, , is a steep, rugged traprock mountain peak on the west bank of the Connecticut River 4.5 miles (7 km) northwest of downtown Holyoke, Massachusetts. The mountain is the southernmost and highest peak of the Mount Tom Range and the highest traprock peak of the long Metacomet Ridge. A popular outdoor recreation resource, the mountain is known for its continuous line of cliffs and talus slopes visible from the south and west, its dramatic rise over the surrounding Connecticut River Valley, and its rare plant communities and microclimate ecosystems.