Anecdotally I see a 1.7 miles/kWh consumption rate when I drive 4.5 miles with a 1,000' elevation gain to the park where I frequently hike with my dog. That works out to around 2.6 kWh for the trip. Assuming that 4.5 miles on level ground takes 1 kWh then 1.6 kWh was used for the 1,000' climb...