Wow this is kind of insane and awesome. Really would depend on the conditions. Yesterday 15 km/h was effortless, and we were cruising at about 24. Must have been fast out at WYS. I wonder how much depends on the course. I figure what you'd want would be a gradual V2-able climb up that was steep enough on the downside to glide. Craftsbury would be well set-up for this, especially if they ever put lights on their trail with the conduit they are putting in. But really depends on the snow/weather.
Not sure if it would be good pre-marathon training in March …
Didn't biggins do 24 hours when we were in Switzerland for the Lauenstein wedding week? I remember that it didn't really seem like that much fun. Probably would have been more fun had any of us kept him company for any part of it whooops.
I think 24h would have a chance of being sort of Type 2 fun if it was on very nice trails which were fast and fun to ski. Skiing 24h on suctiony wet snow would be, well, sucky. Skiing 24h on what we were on last week at Craftsbury would be … better.