Don't drive it, it will scare you out of doing it.
.....out of curiosity, what elevations did people get? My Edge 500 gave me an elevation gain of 4,045 ft ( which became 4,268 when downloaded to Strava!!) for the short route, and my mate's Strava phone app gave him 6,103ft for the long route, both of which strike me as too high!
..is there an "official" figure?