| Prospect Hill | |
| Map: | Massachusetts#USA |
| Elevation Ft: | 282 |
| Location: | Martha's Vineyard, Massachusetts |
| Coordinates: | 41.3659°N -70.7473°W[1] |
| Topo: | USGS Sqibnocket |
Prospect Hill is a mountain in Dukes County, Massachusetts. It is on Martha's Vineyard north of the town of Chilmark. Peaked Hill is located southeast of Prospect Hill.
See main article: Flag on Prospect Hill debate. Prospect Hill was the location of George Washington's command post during the Siege of Boston in the American Revolution. It also served as a training facility in the American Civil War. On New Year's Day in 1776, Washington conducted a flag-raising ceremony to raise the morale of the men of the Continental Army. The standard account features the Grand Union Flag flying, although in 2006, Peter Ansoff advanced a theory that it was actually a British Union Flag instead.[2] Others, such as Byron DeLear, have argued in favour of the traditional version of events.[3]