East of this valley is an area of rolling uplands dotted with lakes and dissected by streams flowing into the Connecticut River in the west and into the Merrimack, Quinebaug, Blackstone, or Charles rivers, or into other shorter, coastal rivers in the east. Just to the east of the Pioneer Valley, hills rise steeply toward the divide between the Connecticut River basin and the river basins to the east. This divide runs through central Massachusetts, though the summit of Mount Wachusett, the highest point in the state east of the Connecticut River, rising to 2,006 feet (611 meters).