Looking for fast 20" gravel tire.

Whoops - I got into the Unbound Gravel 100 mile race. I won't be racing anyone but myself. It's be a victory if I can finish.

I'm thinking of using my Bike Friday All-Packa, crazily enough. Was thinking of using Schwalbe Marathon 365 tires (2.15"). They've been good for me. But want to see if there are other opinions of good, fast gravel tires. Unbound will likely have some chunky sections, and if it rains, I'll need a tire that'll shed mud and 2.25" or less (for mud clearing ability).

So, hive mind, whaddya think?