The Appalachian Trail runs through Berkshire County in Massachusetts. In the summer months many breeding warblers can be observed along the trail. Towards the summit of Mount Greylock (the highest elevation in Massachusetts) breeding birds of significance include: Swainson's Thrush and Blackpoll Warbler. Historically, the peak of Mount Greylock was also a breeding location for Bicknell's Thrush. The Appalachian Trail Conservancy Webpage provides highlights and useful information about the Massachusetts portion of the Appalachian Trail. The follow are a list of eBird Hotspots that intersect the trail in Massachusetts in order from the south to the north.