Eastern Hemlock
ParkMassachusetts, US
The Monoliths
The Monoliths offers a captivating journey into Massachusetts' glacial past.
About
The Monoliths offers a captivating journey into Massachusetts' glacial past. This 116-acre park showcases dramatic rock formations sculpted by ancient glaciers, inviting visitors to explore a unique natural landscape. It’s a cherished preserve, managed by The Trustees of Reservations, that promises both geological wonder and peaceful forest immersion.
The highlight of The Monoliths is undoubtedly its impressive glacial erratic boulders: Big Rock and Little Rock. Little Rock is a giant granite monolith that appears silhouetted against the sky, while the 30-foot-tall Big Rock rests in a small shrub swamp, its depth unknown. These immense stones, plucked from bedrock and carried by glaciers, serve as a testament to the powerful geological forces that shaped New England's landscape thousands of years ago. The park's moderate loop trails wind through a serene forest, leading hikers to these awe-inspiring natural landmarks.
Visiting The Monoliths provides an opportunity for quiet reflection and an appreciation for natural history. It's a place where you can witness the raw power of nature firsthand, enjoy invigorating hikes through tranquil woodlands, and capture striking photographs of these ancient stone giants. The accessible trails make it an ideal destination for those seeking a refreshing outdoor experience without venturing too far off the beaten path. Planning to visit? Download the Snappit app to identify the wildlife you spot in real-time.
The Monoliths, originally known as Agassiz Rock, was named in 1874 by students to honor Louis Agassiz, a Harvard University professor who first theorized that New England's scattered rocks were shaped and deposited by glaciers. Agassiz visited the site, finding its erratic physical features consistent with his hypothesis, challenging the then-prevailing belief that such formations were a result of Noah's flood. The first parcel of land for the preserve was donated in 1957, with subsequent gifts and purchases expanding the property over the years, managed by The Trustees of Reservations. In 2020, The Trustees announced plans to rename the property, and the change to "The Monoliths" was completed in 2022. This renaming addressed increasing public discomfort with Louis Agassiz's legacy, specifically his racist teachings involving polygenism, a belief that non-white races were inherently inferior.
What to do here
Hike the 1.5-mile loop trail to witness the impressive Big and Little Rocks. Enjoy nature walks through the peaceful forest, observe geological features, and capture scenic photographs.
Seasonal info
After long periods of rain, the area around Big Rock can be prone to flooding, so exercise caution. Authorized seasonal bow hunting is permitted on the reservation from the first Monday in October through December, Monday through Saturday. Signage is posted at the property, and visitors should be aware and take precautions during this period.
Accessibility
The trails are considered moderate, featuring rocks, roots, and some elevation gain (around 150 feet or 52 meters), making them suitable for casual hikers and families. Off-road parking is available for approximately 10 cars near the trailhead.
Don't miss
1
Big Rock
A 30-foot-tall glacial erratic boulder resting in a shrub swamp.
2
Little Rock
A massive granite monolith perched on a smaller stone, creating a distinctive silhouette.
3
Beaverdam Hill
The elevated area through which the main loop trail ascends, offering varied forest scenery.
4
Glacial Formations
Numerous smaller erratic boulders scattered throughout the preserve, showcasing glacial activity.
Wildlife you might spot
12Each card links to a full Explore page with photos, traits, and fun facts.
Snap map for this place
Start with the big picture, then zoom in to explore individual wildlife observations around this place.
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Good to know before you go
Wear sturdy hiking shoes or boots, as trails can be rocky and rooted, especially after rain.
Check weather conditions before visiting, as heavy rain can cause flooding around Big Rock.
Download or photograph a trail map from the bulletin board at the parking area, as supplies can run out.
Be aware of seasonal bow hunting activity from October through December, and look for posted signage.
Visit during off-peak hours for a more solitary experience, as parking is limited to about 10 cars.
Bring a camera to capture the unique geological formations and serene forest scenery.
Frequently asked questions
- The Monoliths is a 116-acre nature preserve in Manchester-by-the-Sea, Massachusetts, managed by The Trustees of Reservations, famous for its impressive glacial erratic boulders, Big Rock and Little Rock.
- The property, formerly known as Agassiz Rock, was renamed "The Monoliths" in 2022 by The Trustees of Reservations due to increasing discomfort with the racist teachings of its original namesake, Louis Agassiz.
- The trails at The Monoliths are generally considered moderate, featuring some uneven terrain, roots, and elevation changes. They are suitable for casual hikers and families, but visitors should be prepared for typical forest trail conditions.
Recent snaps at this place
Jul 20, 2024
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Photo attribution
(c) Greg P, some rights reserved (CC BY)
License: CC BY 4.0 ↗
Image may be shown cropped inside the card frame.
Jul 20, 2024
i
Photo attribution
(c) Greg P, some rights reserved (CC BY)
License: CC BY 4.0 ↗
Image may be shown cropped inside the card frame.
Apr 25, 2024
i
Photo attribution
(c) Tyler Ekholm, some rights reserved (CC BY)
License: CC BY 4.0 ↗
Image may be shown cropped inside the card frame.
Apr 25, 2024
i
Photo attribution
(c) Tyler Ekholm, some rights reserved (CC BY)
License: CC BY 4.0 ↗
Image may be shown cropped inside the card frame.
May 1, 2026
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