You'll feel it for sure.
That's about how much climbing and miles is in the Cheaha Challenge here in Alabama this weekend. We rode it a few weeks ago for practice and decided the practice was enough and will be skipping the official ride. Not because of the climbing but the condition of the road for about 10 miles in the park (which must be traveled twice).
For me and around where I live, 7k feet is a pretty good bit.