RSVPs have exceeded our capacity, so we are placing anyone who RSVPs at this point on a waiting list. Thank you for your interest in the Woodcock Sit; please keep an eye on GMI's events page for more nature events. Enjoy an evening to observe one of the highlights of early spring migration. American Woodcock […]

The sky’s the limit on March 13 as we open the GMI observatory to gaze at the stars. Bring your own telescope or see the stars and planets with GMI’s 11″ telescope. We’ll get started a little before sunset (6:30). Please RSVP to lori@greatmarshinstitute.org. This will help us to organize and keep groups small, as […]

Come join us at The Great Marsh Institute on Sunday, March 15th at 8:00 AM for our monthly bird walk. Please RSVP to lori@greatmarshinstitute.org. This will help us to organize and keep groups small. This event is free but donations are always welcome via our Paypal, Venmo, or cash donations at the door.

Calling all artists (and non-artists too)! Saturday, March, 21st the Great Marsh will be open dawn to dusk. Take a self-guided tour to paint, take photos, or simply enjoy the wetlands, woods, and meadows. If you are interested in attending, please RSVP to lori@greatmarshinstitute.org with your name and the time you plan to arrive. Check-in […]

Welcome to the Third Annual Great Marsh Mud Mosey which feature a 5Kish run throughout a very unique private property in Northern Chester County.  The race proceeds will be donated to the Great Marsh Institute and ChesCo Search Dogs.   Saturday, April 11th, 2026 More event details coming soon!