At breakfast, the weather service called for a one-percent chance of snow. Why would they consider that a chance at all? Why not just round to zero? We laughed about it as we wolfed down toast and eggs. After months of drought and no indication from long-term weather forecasts, there was no way it would snow today. We finished our breakfast, got into the car, and drove out to the trailhead. We had in mind to climb Mount Tallac, one of the more prominent and recognizable peaks of the Tahoe area and Desolation Wilderness.