Thanks for your response! I do plan to run at least 3x a week if I am only able to ski 2x a week (and am currently running between ~20 and 30 mpw). FWIW, it will be running on snow since I avoid pavement like the plague. If we have a good snow year I will be able to ski more. But you know how that goes! Last year we had a ton of snow up high but not much at the lower elevations, which is what would be most accessible to me during the work week. And then there have been years where we didn't get so much snow but it was colder and we got more down low, so I could literally ski in my neighborhood. Up to the weather gods, I guess.

I might see how December goes (once we get enough snow to get started; we seem to be off to a slow start for Nordic). If I get to feeling too anxious I can always go up and ski with a headlamp in January and February. I'm hopeful that my running base will at least help a little (I do have a 50k run a couple of weeks after the 50k ski, so I will still need to run a fair amount).

I don't have any illusions of doing this thing fast, but I do want to finish and not feel like I've been put through the wringer because of undertraining. I am (obviously!) still thinking that perhaps I have committed to something a bit too overambitious. I guess I should just try to stick with a program and see how it goes, eh?

Thanks again. Now, if we would just get a decent amount of cold snow, I could scrape off the storage wax and get started!