Thompson Island

This island of diverse habitats is home to Outward Bound education center.

The island is home to Thompson Island Outward Bound Education Center, a non-profit organization that puts people in fun but challenging situations in order to help them develop teamwork, compassion and self-confidence. Activities include sailing, climbing, leadership training and environmental exploration.

The island's services include: summertime expeditions for youths ages 12-17; leadership, environmental education and summer learning programs for youth groups; and corporate teambuilding with Outward Bound Professional. Thompson Island Signature Events and Conference Center also offers catered clambakes, company outings, parties, weddings and meetings.

The island's natural features include a drumlin and a moraine; oak, tamarack, maple, and birch trees; open fields, wild flowers, and berry bushes; and 50 acres of salt marshes. It is home to many animals, including egrets, herons, peregrine falcons and hermit crabs.

Short History
Previously inhabited by Native Americans, David Thompson establishes a trading post on the island in 1626. During the next two centuries, ownership of the island changes several times but is used primarily for grazing livestock. In 1833 the Boston Farm School is established on Thompson Island and merges with the Boston Asylum for Boys two years later. Renamed the Boston Farm and Trade School in 1907, its vocational and farming emphasis remained until the middle of the 20th century when it was renamed Thompson Academy. In 1988, Outward Bound partnered to operate the island, creating a new entity - Thompson Island Outward Bound Education Center. The island continues its mission to serve the underserved youth of Greater Boston with programs that instill teamwork, self-confidence and compassion, and encourage learning by doing.

General Information
This island of Boston Harbor Islands national park area is managed by Thompson Island Outward Bound Education Center (TIOBEC).

For more information on public access to Thompson Island, please visit our partnership website page for Thompson Island.

Agency Designation: Thompson Island Outward Bound Education Center
Current Use: Education; Event and Conference venue; park purposes
Harbor Location: Inner Harbor
Acreage: 169.9 upland acres
Highest elevation: 78 feet
Longitude: 42° 18' 53.6" North
Latitude: 71° 0' 53.3" West
Miles from Long Wharf: 4.33

In 2004, a Grant of Conservation Restriction between Thompson Island Outward Bound Education Center, National Park Service, and Department of Conservation and Recreation was signed. This Conservation Restriction is an agreement to the "appropriate balance between: (i) the continued growth and development of the Thompson Island Outward Bound Education Center's educational programs as a part of its unique role in providing such active outdoor environmental education programs as a part of the Boston Harbor Islands Partnership, (ii) enjoyment of access to the natural environment of the Conservation Area by members of the public on both an escorted and unescorted basis, and (iii) protection of the natural environment of the island from damage and overuse." The Conservation Restriction also lays out specific provisions, prohibited activities, and reserved rights agreed upon by Thompson Island Outward Bound Education Center, National Park Service, and Department of Conservation and Recreation. For more information regarding the Conservation Restriction, please review the full text of the Grant of Conservation Restriction or search for “Thompson Island” on the Suffolk County Registry of Deeds’ website.

Visitor Facilities & Services
Summer Sundays or through TIOBEC.
Visitor season:
Boat slips:
Visitor staff:
Guided tours:
Park boats:
Park tour boat
Car access:
Flush toilets:
0 (capacity ea: 0
Composting toilets:
Group campsites:
0 (capacity ea: 0)
Picnic areas:
Camping capacity:
Cooking grills:
Drinking water:
Walking trails:

On-island Circulation: ISLAND OPEN TO GENERAL PUBLIC ON SUNDAYS DURING THE SUMMER SEASON. Approximately one half mile of paved roads are located in the school complex and two miles of gravel roads extend along the length of the island. Paths extend throughout the campus area and into woodland areas.

Visitor Cautions: Unsupervised use of rope courses is prohibited and is marked with warning signs.

Natural History Overview
The island is a mix of hardwood tree stands, remnant pear and apple orchards, ornamental trees and shrubs, open meadows, shrubby areas of successional growth, sumac groves, salt marsh grasses, and manicured lawns, including a soccer field.

Survey in progress.

The island’s highest drumlin rises to an elevation of 78 feet on the northeastern half of the island, where the school complex is located. The remainder of the island is composed of low rolling hills dissected by a wetland and salt marsh. At low tide, a sandspit and mudflats on the south side of the island almost connect with Squantum.

Water Features
Further study required.

Views and Vistas
Views to Dorchester, Downtown Boston, South Boston, Quincy (Squantum), and Long, Moon, Spectacle, and Castle Islands.
  • The following is a rough list of buildings, and foundations-further verification is needed:
    • Gymnasium
    • Picnic and boat shed
    • Maintenance Building
    • Corn Barn
    • Small shed
    • Foundation of Poultry barn
    • Composting Toilet near orchard
    • Staff residence (along campus access road)
    • Foundation of administration building designed by Charles Bulfinch
    • Gardner Hall
    • Hughes Building
    • Office building
    • Dormitory (4)
    • Faculty house (2)
    • Dining hall
    • Foundation of compost shed
    • Foundation of weather station
    • Foundation of root cellar
    • Foundation of barn (barely evident)
  • None
Other Structures
  • Pier
  • Stone walls
  • Wood retaining wall
  • Alpine towers and ropes courses
  • Fencing for livestock (pigs)
  • Interpretive signs throughout the island
Public tours are provided on summer weekends and at other times by arrangement.

Last updated: June 22, 2021

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15 State Street
4th Floor

Boston , MA 02109


617 223-8666

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