sentences:  Known for its whitewater rapids and scenic beauty, the Westfield River provides over of whitewater canoeing and kayaking, in addition to one of the largest roadless wilderness areas remaining in the Commonwealth.The Westfield River is the Connecticut River's longest tributary in Massachusetts, although the Chicopee River's basin is much larger, and contributes more water to the Connecticut.The Connecticut's northern tributary, the Deerfield River, is nearly as long as the Westfield—only shorter than the Westfield.