For the first time in 10 months, Lake Tahoe reached its natural rim Saturday. This last happened in June 2015 when the lake stayed at or slightly above the rim for a 5 day stretch between June 10th and June 15th. Prior to that, the lake had been below the rim since October 16th, 2014. Rising above the rim is a significant benchmark for the success of a water year. In early December, just as the wet season was beginning, the lake as more than 1.5 feet below its natural rim. According to the National Weather Service in Reno, 60 billion gallons of water have flowed into the lake since early December.