My Volt ownership experience is still new, about 500 miles, but I will soon be driving from Fort Collins to Breckenridge in Colorado. This involves several long uphill pulls. I'm interested in knowing more about what to expect both in the uphill and the downhill (regen) portions of the drive. There is also a strong possibility that I won't be able to charge the battery while in Breck, so I am wondering about the return trip. To avoid a rehash of previous posts, I did try to exercise due diligence in searching for relevant posts. A lot of stuff is posted about mountain mode -- I will be using it all the way -- but I didn't uncover very much on really tough climbs, for example, like the one from Silver Plume to the Eisenhower Tunnel in Colorado. By the way, kudos to member BillR for providing the most relevant post that I did find.