Agassiz Rock


143 acres

Ascend to where a massive granite monolith juts into the sky, then pass a swamp where another huge boulder has sat as a silent witness for millennia.


Plan Your Visit
  • Overview
  • Ideas for Your Visit
  • Admission & Hours
  • Directions & Contact Info
  • Property Map
  • Regulations & Advisories


Big and Little Agassiz Rocks are dramatic examples of giant boulders plucked from bedrock and carried far away by the last glacier. As the glaciers scoured this landscape, the mass of bedrock forming the hill proved more resistant than the surrounding soil, forcing the bottom of the glacier up and over the hill. The north side was smoothed and the south side left steep and rugged as the glacier broke off chunks of rock as it passed.

Ideas for Your Visit

Make your acquaintance with these geologic marvels by ascending the property’s 1.5-mile loop trail up Beaverdam Hill. The moderate hike leads to an inimitable sight: Little Agassiz Rock, a giant granite monolith silhouetted against the clouds. A short distance away, in a small shrub swamp past the other boulders, perched on the edge of this glaciated upland, rests 30-foot-tall Big Agassiz Rock. Nobody knows how far below the ground it is buried.

After long periods of rain, take extra caution: when the water table is high, the area surrounding Big Agassiz Rock can be flooded.

Admission & Hours

FREE to all.

This property is open during normal hours. The Trustees asks that visitors follow social distancing guidelines for the health and safety of all. Please note: all buildings and inside areas remain closed on all properties. For more information about our response to COVID-19, please click here.

When to Visit
Open year-round, daily, sunrise to sunset. Allow a minimum of 1 hour.


Directions & Contact Info

School Street
Manchester-by-the-Sea, MA 01944
Telephone: 978.526.8687

Get directions on Google Maps.

From Rt. 128 (exit 15), take School St. north for 0.5 mi. Entrance and roadside parking (10 cars) on right.

Property Map

Free trail map distributed from bulletin board in the parking area. Please understand that supplies periodically run out.

We recommend that you take a photo of the map on your phone so you can refer to it during your visit, or download a trail map before you head out.

Regulations & Advisories

  • Seasonal hunting is not permitted at this property without prior written permission from the Stewardship Manager. In addition, a Trustees of Reservations permit is required. Learn more about hunting on Trustees properties.
  • The Trustees reserves the right to photograph or video visitors and program participants for promotional use, and usage of our properties implies consent. Find the full policy here.


Before Setting Out
More to Explore
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The View From Here
See What People Say

Beautiful easy hike for those who are ready to get out of their car or away from being a tourist in Boston.

KarenHawkinson, Trip Advisor Review

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