Avalon Nature Preserve and all trails are closed to visitors on Mondays.

Please be advised of the following closures:

Harbor Road between Shep Jones Lane and Bacon Road will be closed for paving from Monday, April 22nd through Friday, April 26th.

The area surrounding the Cartas Al Cielo Sculpture on the Hilltop Meadow trail will be closed for maintenance beginning Tuesday, March 12th for approximately 4-5 weeks.


Click Here to Download the Avalon Nature Preserve App

Only Available in the Apple App Store



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 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