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Making America's Best Idea Even Better
Boston Harbor Islands National Recreation AreaMinutes Away. Worlds Apart.
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Boston Harbor Islands National Recreation Area
Island Facts
 
 
Choose an island below for details about each of the islands in the park. The topics shown are size, location, managing agency, facilities, natural history, historical sketch . . . and more.

 
 
The sizes of the islands in the park change every hour, as the ocean tides ebb and flow on their shores. All totaled, the park islands change from 1,483 to 3,067 acres during the tidal cycle. Learn how island acreage was measured, considering daily tides.

The names of several islands have also changed over time. How we selected the spelling of island names, and alternate names for some islands, are described in, "What's in a name?"
Boston Harbor Inner Islands
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Learn the layout of the park. (PDF)
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Aerial View of a Glacial Drumlin in Boston Harbor  

Did You Know?
Boston Harbor Islands National Recreation Area is one of the very few places in the world where sea drumlins, glacially-formed mounds, may be found. They were formed by retreating glaciers about 15,000 years ago.
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Last Updated: November 04, 2008 at 12:09 EST