July at Mashomack

Trails: Open 7 days a week, from dawn to dusk

New Summer Hours

Visitor Center Exhibits: Open Wednesday – Sunday, 10 AM to 3 PM 
Visitor Center Restrooms: Open daily, 6 AM to 8 PM

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Great shearwater held by TNC Marine Scientist Juliet Lamb. © Rebecca Kusa/TNC

Seabird Spotlight

For the third year in a row, The Nature Conservancy is conducting GPS tracking of great shearwaters to follow their movements from the time they arrive in New York waters through their fall migration south to breeding colonies on isolated islands, midway between South America and Africa. Great shearwaters are non-breeding residents along our coasts throughout the summer months, but their habitat use during this period has not been well-studied since they are difficult to access in their offshore habitats.

The Nature Conservancy has refined techniques for capturing shearwaters at-sea, and our work is improving understanding of how shearwaters respond to oceanographic conditions and human impacts. This year, our team tagged 20 shearwaters off Montauk with solar-recharging GPS transmitters. They are now transmitting location data every hour to an online portal, providing unprecedented insight into their movements and behavior. Stay tuned for more details in the coming months.

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Summer Programming 

Summer is here! Paddle, hike and explore Mashomack’s marshes, meadows and forests with programs all summer long. All programs require advanced registration unless otherwise noted. Register at nature.org/nyevents. Registration closes 24 hours before program start time. For questions, please email MashomackPreserve@tnc.org

Muddling in the Marsh
Date: Thursday, July 9th, 2:00 – 3:30 PM

Join us as we wade through the water and explore the shoreline of Bass Creek! We’ll check out the fish, crabs, snails and lots of other animals that call the marsh home. Please come prepared to get wet and wear shoes that can go in the water. Nets and buckets will be provided. Ages 4 to 7; Parent or guardian required to stay for the program.

Fireflies in the Meadow
Date: Friday, July 10th, 7:30 – 9:00 PM

Remember the joy of watching the twinkling lights of fireflies on a summer evening? Join us for a walk in Mashomack’s meadows to learn about this amazing insect while using hand nets to get a close-up view of “nature’s fireworks.” All ages welcome.

Dragonfly Field Day
Date: Saturday, July 11th, 10:30 AM – 12:30 PM

(Rain date, Sunday, July 12, same time) 

Dragonflies are beautiful and fascinating insects that play a key role in nature. Join the South Fork Natural History Museum and The Nature Conservancy’s dragonfly expert Kevin Munroe as he leads this exploration at Mashomack’s Bass Creek and Sanctuary Pond. Use hand nets to gently capture dragonflies and get a rare, close-up look at them. You’ll even get  to briefly hold them before they’re safely released. All are welcome. Parent or guardian required.

Log Cabin Creek Shellfish Paddle
Date: Thursday, July 16th, 3:00 – 5:00 PM 

What could be better than spending a summer afternoon paddling along a quiet coast? We will venture to Log Cabin Creek and learn about the importance of shellfish in our coastal waters with Kate Rossi-Snook of Cornell Cooperative Extension. Kayaks, paddles and safety gear provided. Adults only. 

Friends of Music
Date: Wednesday, July 22nd, 4:00 – 5:30 PM

Attendees will enjoy music in nature at the Mashomack Visitor Center pavilion area where the Shelter Island Friends of Music will present world class quartets, in an informal, family-friendly outdoor concert setting. 

A look back at last year’s summer cocktail party fun! Join us on July 23rd for community. © TNC
Summer Cocktail Party
Date: Thursday, July 23rd, 4:00 – 6:00 PM 
2026 marks 75 years of The Nature Conservancy conserving lands and waters around the world. Join us  on the Manor House lawn for a celebratory cocktail party. Indulge in simple nibbles and cold beverages. RSVP to Rebecca Mundy Rmundy@tnc.org | 631-749-1001 ext. 2Nature Writing Workshop with Maryann Calendrille
Date: Saturday, August 1st, 10:00 AM – 12:30 PM 
Join us at Mashomack for a nature writing workshop led by special guest, Maryann Calendrille. An educator, published writer and editor, Maryann has been a passionate environmentalist ever since first planting zinnia seeds in a pint-sized milk carton in elementary school. She brings her love for the natural world to this special opportunity at the preserve. During this immersive, two and a half-hour workshop, participants will gain foundational skills to translate nature writings in a time of climate change into meaningful stories for the public. Together, we will examine various written works on the theme and will have time for deep observation, writing and sharing of work written in the field. Light refreshments provided.
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July Book in the Woods

The Busy Tree by Jennifer Ward 

Enjoy a self-guided, half-mile walk and read as you go. Trees are busy places! Learn all about the importance of trees and the animals that depend on them, from their roots to branches. 

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Conservation practitioners examine and measure trees in a wetland. © Mac Stone/TNC

For All Generations

Join us in celebrating The Nature Conservancy’s 75th anniversary and our ongoing story of collaboration, conservation and impact to help people and nature thrive.
Learn more here
Mother swan feeding cygnets. © Daryl Ramrattan/TNC Photo Contest 2019

The Legacy Club

There’s no greater gift than protecting the planet for future generations. Whether you’re beginning or updating your estate plan, The Nature Conservancy is here to help. Don’t wait—make your mark today.
For more information, contact Anne Salmon at (631) 464-0647 or asalmon@tnc.org
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The Nature Conservancy works across New York, the United States and in 83 countries and territories to conserve the lands and waters on which all life depends.
Learn more about our work at nature.org/NewYork
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Copyright (C) 2026 The Nature Conservancy. All rights reserved.

The Nature Conservancy
79 South Ferry Rd
PO Box 850
Shelter Island, New York 11964

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