212 miles taking I-15 NORTH.
I believe you are referring to 'Meadow, Utah'. I could not find a town exactly 315 miles south of Idaho Falls, Idaho on I-15, but there is a town that is 316.7 miles south of Idaho Falls, Idaho named 'Meadow, Utah'. This is probably the town that you are referring to. Of course, that may vary according to how the distance is measured.
Idaho Falls is a city in Idaho, it is not a waterfall. The elevation of Idaho Falls is 4,700 ft.
It is 733 miles via Grand Junction, Provo, Salt Lake City and Twin Falls.
The distance from Salt Lake City, Utah to Rexburg, Idaho is approximately 200 miles. This typically translates to about a 3.5 to 4-hour drive by car, depending on traffic and road conditions.
348 miles
It is a 2038.0 mi drive
416 miles
1261 miles
347 miles
347 miles
571 miles
470 miles