The merced river's narrowest points are 5 to 6 ft wide.
26km at chelyabinks
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.
The narrowest point in the UK runs from Hadrian's Wall to the English East Coast. It is 70 miles wide, or 274 kilometers.
3 miles
The upper tennessee river is about 30 ft to 500 ft wide.
Manhattan is 0.8 miles wide at its narrowest point, and 2.3 miles at its widest.
Scotland is approximately 274 miles wide at its widest point, from its eastern coast to its western coast.
At its narrowest point Idaho is 50 miles wide.
94 km at Illapel
As far as the Peninsula goes, if you drew a line from Crystal River to New Smyrna Beach, about 110 miles. This is the part of the state where it bottlenecks before getting into the panhandle.
The narrowest point of the channel is the Strait of Dover which is 34 km wide.