This arboretum/preserve was created by its founder in memory of his son. It is a nature lover’s paradise with more than 80 acres of trails, a wildflower meadow, habitat for numerous woodland animals, many species of ferns and massive oak trees.  It is located on Harbor Road, off Main Street, across from Stony Brook Grist Mill.

The Park is closed Mondays and open Tuesday – Sunday. The hours vary seasonally.

Spring: 7AM – 7PM (April – May)

Summer: 6AM – 8PM (June – August)

Fall: 7AM – 7PM (September – October)

Winter: 7AM – 5PM (November – March)

You can also visit the Avalon Nature Preserve website for more information and details.


200 Harbor Road
Stony Brook, NY 11790