The Narrows may be difficult to get to, but entirely worth the trip, if traveling with older kids who can make the hike, much of it wading through water. The Narrows is a 16-mile gorge that is 2,000 feet deep and at its narrowest, only 20 feet wide. To reach it, hikers need to walk in the Virgin River, and sometimes swim in water with strong currents. This is a strenuous hike and visitors may choose to hike from the bottom and back or from the top to bottom and will require a full day.