The ride I'm about to go out and do is around 850' over 27 miles. Not excessively hilly. Not super flat, either. But I like hills. I try to get out to the mountains when I can. A very hilly ride for me would be 3000' over a metric century. I've done more, but I would classify that as very, very hilly. Usually pretty darn wiped, as well. Actually a very hilly ride wipes me out, too. But what can I say, I like the pain