Thompson Island is an island in the Boston Harbor, about 1 mile offshore from downtown Boston, Massachusetts. The island is managed by the Thompson Island Outward Bound Education Center, a non-profit education organization. The island is open to visitors on Saturdays and Sundays from Memorial Day through Labor Day; otherwise access is by arrangement only. Thompson Island is one of the largest, most accessible and ecologically diverse islands in the Boston Harbor Islands National Recreation Area.For Thompson Island and beyond, use our Boston day trip app to get the most from your Boston vacation.
The island has a size of 170 acres (0.69 km2), and the highest point is a drumlin that reaches a height of 78 feet above sea level. The rest of the island comprises low rolling hills and a salt marsh. The island has a mixed vegetation, including hardwood tree stands, remnant pear and apple orchards, ornamental trees and shrubs, and salt marsh grasses. The island has open meadows, forests, marine wetlands, sumac groves, and a variety of other geological features as well. Amenities include a formal school campus complete with classrooms, dormitories, dining hall, auditoriums, gymnasium, lab space, outdoor challenge courses, and climbing towers. At low tide, a sandbar connects it to Squaw Rock on the Squantum peninsula, allowing land travel between the two..
Thompson Island Reviews
This is a Boston Harbor Island really close to South Boston. A very nice place to go by ferry.I think they have Outward Bound Events there too. Do go if in Boston for a while. more »
Been on this island with coworkers for guided nature walks. The island is large enough to be entertaining but not too large where walking around it will seem to never end. Very relaxing, while... more »
Fun island to explore for a few hours. Great spot to have a picnic. If the sun is going to be out make sure you bring plenty of sunblock.
Went there for a field trip. Even though the weather wasn't the best when we were there, it was still a blast! The staff were very friendly, and the view from the beach was breathtaking. Can't wait to go to the Thompson Island summer camp this summer.
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