I can do it staying mostly in Zone 1…
How long does a Zone 1 lap take?
…so I imagine it will have a good training effect!
The duration is so long that this will be a serious withdrawal. This shouldn’t be counted as “base training”. But these events are why to train anyway. “Enjoy”!
—- how should I schedule training next week?
You shouldn’t. This should be a recovery week. So just short, easy sessions, maybe with a few pick-ups here and there.
-— any nutrition tips? Before the race and during?
Ideally you’d want to test this before. Because the pace will be slow, I think you can eat normally. The biggest thing will be to be organized about it so you don’t have to carry much and don’t lose time restocking. Have supplies at the base (in a cooler and/or with a helper) and only grab and go. Eat on the ups.
—- race strategies?
The average speed for an event this long is going to be super slow. Don’t go out of the gate hard at all. I would start this at a recovery pace and stay there. If there’s a “race” at all, it won’t happen until the end of the race anyway.
—- how should I think about scheduling training the week after the race?
You shouldn’t. This is going to take a lot out of you. It should be a recovery week. Lots of food, lots of sleep, maybe a few walks. No training. Search this site for the article on Mike Foote’s 24-hour record. He’s a beast, he went slow (for him), and it took him a long time to recover.