6 of us rode on Sunday afternoon, 2 on fatbikes, 4 on normal tires. As stated above, North and West loops were in great shape due to lots of past traffic. There were a few crusty ice spots on West, but they didn't seem to slow any of us down. We attempted the Grinder too, but the snow was pretty deep - and after the cutout to Hess Rd (about a mile in), there were no tracks at all. 3 of us (including the 2 fatbikes) continued on until the 7 mile exit, and it was a slow slog. At least there are tracks now!