Around Fort Collins, eh? There are additional considerations for disk brakes there--one pro, another con.

It's dead flat where I live, so I have little experience with descents, let alone high-speed and over the course of several miles. When I visited Fort Collins, I was glad I'd brought my disk brake bike. I rode the brakes a lot (due to my inexperience) descending from Estes Park down Devil's Gulch and through Glen Haven. They were very warm when we stopped for cinnamon buns in Glen Haven. I don't know what I'd have done to rim brakes using them the same way. (One of the locals I was riding with got a speeding ticket on his bike on the same descent. Your sheriff is something.)

The con is that the disk brakes make the wheels very heavy. The hubs are heavy, the rims are heavy, and the rotors also add to the mass you're spinning. I worked really hard to get the weight down on the wheels when I had a custom set made. They're still several hundred grams heavier than my heaviest (1609g) rim brake wheels. Climbing up to Estes Park was a real chore with those heavy wheels. Part of it was me too, as a lifelong low-lander and flat-lander, but one of my other bikes with lighter wheels would have been so much easier on that climb.

FWIW, when I return to Colorado, I'll be bringing a rim brake bike instead, probably the one with the 1400g wheelset.