Fuel EX 9.8. Clear and sunny, super cold - 10 degrees at the start, only got up to 14 degrees by ride's end, NW winds @ 8-10 mph, gusts up to 15 mph. I didn't see any other cyclists out, only one set of fat bike tracks on about 1/2 of my route on the West side. One trail runner out and 4 deer spotted, although it could have been 2 deer spotted twice. Trail conditions were perfect, several inches of packed down snow followed by an inch or so of powder from last night, so I got good traction throughout on the MTB. Late start at a few minutes before Noon, close to 1:40 ride time then got off the trail before the 2 hour cold spell moved in. Since it was my birthday, no stops afterwards, just headed home to get cleaned up before going out for dinner. I dressed very warm: 2 pairs of wool socks with 2 toe warmers on each foot, upper and lower, Wolvhammer boots with the liner from the old pair, Rapha heavy tights, 2 LS merino base shirts, one poly SS shirt, my heavy Bontrager jacket, fuzzy balaclava, merino neck gator, ear covers, Smith goggles. Even with 2 hand warmers loaded in each Pogie, I did 3 layers of gloves - light and heavy merino base, heavy 45NRTH outer shells. All in all never got cold and never got hot.