Looks like fun. As a flatlander, I try not to head over 6,000 ft without a day or two to get used to it. The altitude won't be a problem, the gravel and the climbing will but that's the fun part right? If I go, I'll be sorely tempted to bring my gravel grinder (a '93 Bridgestone XO-2 with 26 x 1.75 tires and a triple crank) even though it's not exactly vintage.