A 116-acre reservation formerly named Agassiz Rock, renamed The Monoliths in 2022 for the two massive granite boulders (Little Rock and 30-foot Big Rock) reached by a moderate 1.5-mile loop up Beaverdam Hill.
What to expect
Trails
1.5-mile moderate loop up Beaverdam Hill to Little Rock and Big Rock; trail map at the parking-area bulletin board and downloadable online
Dogs
The town by-law on dogs running at large applies here whoever holds the land: a dog may not be off its owner's premises unless it is on a leash or under the direct voice command of a person able to control it. Owners must remove and…
Hours
Sunrise to sunset daily
Managed by
The Trustees of Reservations
617-542-7696 · WebsiteCommon questions
Is The Monoliths open today?
The Monoliths is a public preserve in Manchester, MA. Posted hours: Sunrise to sunset daily.
Yes, authorized seasonal bow hunting runs the first Monday in October through the end of December, half an hour before sunrise to half an hour after sunset, Monday through Saturday.
Where do I park at The Monoliths?
Free lot (Free).
Is there an entry fee at The Monoliths?
No, entry is free.
Can I bring my dog to The Monoliths?
The town by-law on dogs running at large applies here whoever holds the land: a dog may not be off its owner's premises unless it is on a leash or under the direct voice command of a person able to control it. Owners must remove and dispose of any waste their dog leaves. A service animal working…
What rules should I know at The Monoliths?
High water table can flood the Big Rock area after heavy rain.