This will be interesting. I imagine they have already tried it before entering this climb on June 26. I know that driving to work each day with a climb of only 450 feet, I see the range drop quickly.
On my attempt up our Mt. Lemmon the range dropped very quickly. This highway begins at 2850 feet and climbs up to 9000 feet. I made it up to 5200 feet, a climb of 2350 feet and went from 90 miles range, down to 34 miles. (This was before the software update.) Coming down was great because the regen brought the range up to 92 miles range at the bottom. I'll be following this Pikes Peak climb.