Any of you SLC area LEAFers tried for the Long-range-on-one-charge record?
Your relatively high altitude and high Summer temperatures, and many relatively level route options, all will give you a great advantage.
If you find a safe low speed route, and are patient enough, over 160 miles should not be too hard to achieve, IMO.
But to go much further than that, you will probably have to find a route allowing lower-than-normal driving speeds.