Personally I would head Southwest if I were you, seem to have more of the nicer courses in Colorado. I agree 100% with Wayne on Beaver Ranch in Conifer, just an amazing Disc Golf experience from start to finish. It is one of the Top 20 or so courses in the USA and worthy of that rank. A disc shop, players lounge and putting challenge right at the base of the mountain, then the 23 hole course plays up it. Currently the best course I have ever played out of the 56 courses on my resume.
Another fun mountain course I enjoyed was Jellystone, small disc shop/general store and they even rent out goats to caddy for you. Yeah, Goats! Nice elevation changes, great scenery and multiple pin placements. Fairly easy to navigate as well with decent pads. Not as beautiful as Beaver Ranch but a pretty fun mountain course regardless.
The city courses are nice but nothing special. Expo, Interlocken, Village Greens, Ken Caryl, Lighthouse, etc... Mostly open park courses with very few obstacles. At least Expo has some ponds/small streams and waling paths to make it more challenging. Oh man do I miss Johnny Roberts (RIP/redesign).
Have fun and remember to pack your Understable discs as that altitude messes with stability.