Beginning April 2021, Avalon Nature Preserve will be

closed on Mondays.


** Thurs. Oct 14   &   Fri. Oct 15 **

All trails east of Rhododendron Road, including the main entrance boardwalk and the labyrinth, are temporarily closed due to construction.  The rest of the preserve remains open.  Parking is available on Shep Jones Lane in designated lots only.

The boardwalk entrance is located at 200 Harbor Road, Stony Brook, NY.

Parking is available along Main Street, on Harbor Road, and in the shopping center just past the Preserve on Main Street.


Avalon Nature Preserve is free and open to the public.

Make the most of your visit. Explore our trails through five distinct habitats.

Download Map

See what’s happening at Avalon.

Register for yoga or mindful meditation classes, learn more about the universe with our monthly Skylab events or join a nature walk with the Audubon Society.


We believe that no child is too young to begin a connection to the natural world.

Check out Avalon’s great offerings for kids of all ages.

Youth Programs