Widest point North to South: 255 miles. Interstate 15 (the only North-South freeway running the entirety of Montana) runs for 416 miles in the state. East to West: About 630 miles. The shortest route following a highway (US Route 2, from the Idaho border west of Troy to the North Dakota border near Williston) is around 670 miles.
430 miles
At it's widest point (north border) Montana is roughly 550 miles wide.
Wyoming is about 280 miles wide (north to south).
Length (longest distance, north to south): 411 miles
It takes about 12,450.5 miles from the north pole to the south pole or south pole to north pole.
20.6573 miles
About 1,300 miles.
About 10 miles.
790 miles
720 miles
About 340 miles (550 KM) from Eilat (south) to Metula (north).