As of this afternoon there was almost no open water at Twin lakes,Mammoth, & Unity lake. there were guys breaking the ice & fishing from shore & doing well on Trout at both lakes at Twin Lakes park. My buds said that it looked like the ice was approx. 1-1 1/2 " thick. The boat house is closed til Jan. 13, 2020. DON'T FORGET THE NEW LICENSE. sam