Well almost but not quite. It is regular ground that got flooded by the lakes salt water in 1984/85.JPG wrote:Wet salt flat may be more accurate.
If you want a true salt flat you need to drive west on I-80 to Wdendover Utah/Nevada. Wendover AF Station in Utah is where they loaded the first Atomic bombs during WW II. The base is still there.
The Bonneville salt flats are about 3 miles east of the Nevada border on the north side of I-80. This is the infamous Bonneyville race way. There is absolutely nothing there but a very level salt flat for miles and miles. The last exit before you get to Wendover Ut is the exit to take. (about 2 miles). The road goes north for about 2 miles and then they built up a road that goes east out on to the salt flat. It is about 3 moles long and there is nothing there but a flat salt bed and a sign declaring what it is. The salt is flat and massive so the reason it is used for land speed records.
It is under water every few years so they can't hold the speed trials.
BTW, the salt tastes just like table salt. Morton Salt has a large evaporation facility about 30 miles west of Salt Lake City on I-80 on the lake shore.