Foul Rift

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Foul Rift is an approximately mile-long stretch of Class II+ rapids in the Delaware River just south of Belvidere, New Jersey. The rapids are caused by a dramatic descent in the elevation of the riverbed. These rapids are considered the most dangerous in the entire Delaware River Basin.

The Delaware River never became a major industrial shipping channel due to navigational issues created by foul rift and other rapids along the main stem of the river.