I want to mention that the trail on the south side of Mt. Greylock will often have substantial snow even when the base and summit have little-to-none. Last time I was up there a couple years ago, the base at route 8 had no snow in sight. By the time we got to Mark Noepel shelter the snowpack was nearly 2 feet deep, and a good part of the climb to the summit involved 3+ feet of snowpack with much deeper snow drifts. When we got to the summit, it was bare with only a couple inches of snow on the road.