Will be very useful for car trips too
I've had a couple of automobile trips where I really wanted to figure out elevations - basically long trips in the Western US, not in summer, unfamiliar roads.
Wanted to find lowest elevation in case of snow. E.g. thru Payson AZ or Flagstaff AZ. I picked Flagstaff and slid off highway 17. Got back on with no problem... maybe Payson would have had snow also...