Does Lake Tahoe ever freeze?
The main body of Lake Tahoe does not freeze. The stored heat in the Lake’s massive amount of water compared to its relative surface area prevents the Lake from reaching freezing temperature under the prevailing climatic conditions. On rare occasions, Emerald Bay has developed full or partial ice cover and thin ice sheets can form on shallow near shore waters under very cold and calm conditions.
Fact credit: TahoeFacts.com