Summer at Mashomack

Trails are open 7 days a week, from dawn to dusk.

The Visitor Center is open Friday through Sunday,
from 10 a.m. – 3 p.m.
Bathrooms in Visitor Center open daily 8 a.m. – 6 p.m.

Please note this schedule is subject to change
as we closely follow Covid community levels for Suffolk County.

Summertime and the Living Is Easy

at The Nature Conservancy’s Mashomack Preserve! 


Kids in the July session of Mashomack’s Environmental Explorers program had a great time hiking, wading, paddling  and creating as they explored the world around them. Getting close looks at caterpillars, finding beach treasures, and making fun and informative videos had kids jumping for joy while learning about conservation. There are still a few spots left for our third session, August 15th – 18th.

Reserve your spot here. 

Photo Credit: © Rebecca Kusa and Sarah Lewis/TNC

Summer Programming is Afloat at Mashomack!

All programs are free of charge. Be sure to check nature.org/events to learn about new programs as they are added.


*New Children’s Program* Summer Seedlings


Join us at Mashomack for fun, hands-on learning with our team. During this hour-long, drop-off  program for kids ages 4 and up, we’ll explore the natural work around us and learn about different animals that call the preserve home. Activities will include crafts, snacks and exploring our trails. Drop-off, ages 4-plus.

  • Summer Seedlings: Muddling in the Marsh* – Thursday, 8/11, 3 p.m. – 4 p.m.
  • Summer Seedlings: Furry Friends – Thursday, 8/25, 9 a.m. – 10 a.m.

* Guardian required


Coastal Cleanup
Come out for a day of volunteering as we work to clean up our coastline! Together, we can help keep our environment free of litter. All are welcome.

  • Saturday, September 17th, 10 a.m. – 12 p.m


Blue Trail Truck Tour

Join us for this special outing as we explore the far reaches of the preserve by truck. Following over ten miles of the Blue Trail, we’ll travel through forests, past meadows and along the coastline of Mashomack during the golden hours of September. Families welcome, ages 8 -plus. Reservations Required. Heavy rain cancels.

  • Saturday, September 10th, 5 pm – 7 p.m.

For questions or reservations, email MashomackPreserve@tnc.org.


Photo Credit: © Rebecca Kusa/TNC
Shelter Island Green Expo
Come find our table at the annual Shelter Island Green Expo, along with other local nonprofits and environmental groups. The event is free and open to all.

  • American Legion Hall Grounds, Saturday, August 20, 11 am – 3 pm

August Book in the Woods

My Awesome Summer by P. Mantis by Paul Meisel
Can a bug be funny? P. Mantis Is! A praying mantis writes this summer journal, telling the story of its lift from birth until laying its own batch of eggs. Come for a self-guided, half-mile walk and read a story as you go.  A perfect family nature adventure and a great way to get your kids into the outdoors.

U.S. Senate Deal is a Historic Opportunity

to Address the Climate Crisis

 The Nature Conservancy Tells Congress:

Take This Deal and Pass It.

For Information


Photo Credit: © TNC (image from link in article)
Click on trail map to download.


The Nature Conservancy works across New York, the United States and in 79 countries and territories to conserve the lands and waters on which all life depends.

Learn more about our work at nature.org/NewYork


Join us today



AAQ / Resource

Stelle Lomont Rouhani Architects