It's pretty easy actually. Even better, the ride started and ended at my house with long, fast descents on both ends. I live in a village part way up to a col so the start was a drop into the valley below, along the valley for a bit, then up. That first up bagged some 4000+ ft of gain in about 12-13 miles. The altitude is gained fast due to lots of steep grades, steep as in anything above 8%. The second part of that first climb had a lots of double digit grades, up to about 14% apparently. How long did it take? I'm not sure because I stop frequently to take shots then there was a good break for lunch in a restaurant near the 5th col plus some breaks to chat with some riders I hooked up with for part of the jaunt. Good part of the day at any rate. I left the house at around 6 in the morning, got back late afternoon.