500 miles
about 1,500 miles across
The Capertee Valley, New South Wales, Australia is wider than the Grand Canyon and claimed to be the world's widest.
3820 KM across at its widest point. -Edit---v I've read on a few sites like eNotes, and they say 3180 miles (5100 kilometers)
about 780 miles
Ms.Mehl?
The Ohio River is 1 mile (1.6 km) across at its widest point just west of downtown Louisville, Kentucky.
Mount Augustus in Western Australia is approximately 8km in length and 3km in width at its widest point.
The lake is some 550 km long and 35 km across at its widest point.
The Florida Peninsula is approximately 150 miles across at its widest point. This region is known for its diverse ecosystems, including wetlands, beaches, and forests. It is bordered by the Gulf of Mexico to the west and the Atlantic Ocean to the east. The peninsula plays a significant role in the state's geography and climate.
The widest point of the tennessee river is near the tributary of the ohio river, reaching 1 1/2 miles wide at its widest point.
Ms.Mehl?