A guy at my work was out there earlier in the day. He said it was 8-10" close to shore, and got thinner as you went out. They got to where it was 5" and turned around. 4-6" is recommended for ATVs. The guys were in a side by side which is almost a VW beetle sized ATV. I'm guessing 4" of ice. In the first week of January, the lake temp was still in the 50s! Crazy.