| Mount Greylock Regional School | |
| Address: | 1781 Cold Spring Road |
| City: | Williamstown |
| State: | Massachusetts |
| Country: | United States |
| District: | Mount Greylock Regional School District |
| Type: | Public middle and high school |
| Grades: | 7–12 |
| Principal: | Mary MacDonald Jacob Schutz |
| Enrollment: | 552 (2018–19)[1] |
| Faculty: | 44.67 (FTE) |
| Campus Type: | Rural |
| Team Name: | Mounties |
| Colors: | Gray and red |
Mount Greylock Regional School is a public middle and high school in Williamstown, Massachusetts, within the foothills of Mount Greylock. The school is part of the Mount Greylock Regional School District.[2]
Mount Greylock Regional School is located on the site of a former airport in southern Williamstown. The school serves the community of Williamstown, as well as nearby Hancock, Lanesborough, and New Ashford.
Mount Greylock School has a chapter of the National Honor Society, and a local partnership with the Sage City Symphony.
Mount Greylock Regional School ski teams have utilized Prospect Mountain in Vermont. The Ephs of Williams College use the high school facilities for cross country.The Mount Greylock volleyball team was one of the most consistent teams in the state from 2021-on, making it to the PVIAC Class C Western Massachusetts Volleyball Final in 2022, losing to Frontier. The Mounties then went undefeated in 2023, with a perfect 25-0 campaign that included a Class C Western Mass. Title win over county-rival Lenox, the No. 1 overall seed in the Massachusetts Interscholastic Athletic Association Division V State tournament and a championship over Bourne in that game.