Due to the complexities of the house buying/closing, the packing up, moving, unpacking, working, and getting used to a new city/state, etc, I've had to take off longer than I wanted to from running. In the last 4 weeks, I've only been able to run a couple of times. This week, I've been able to get in three runs and I've already discovered that I'm not quite fully adjusted to the altitude yet.
On a very cool note, I've discovered some trails within running/riding distance from home and they take me up to a rattlesnake infested high plain leading up and around a ridge line with a great view of Denver and the front range. Not overly technical, but it gives a good 7-13 mile workout with long gradual climbs and descents and lots of fresh air!
Before the Leadville Marathon, I got a pair of Montrail Continental Divides and have loved them, but for one thing. A blister forms on my right heel whenever I don't run at least 3 times per week every week to keep the callous toughened up. Looks like I'll have to pick up the mileage or switch shoes again..... or both!