Castalia Marsh is a salt water wetland marsh and beach popular for birdwatching located on the east side of Grand Manan Island, New Brunswick. There is a short 0.5 kilometre trail leading to a lookout tower.
Castalia Marsh adventures, and activities most enjoyed in the park includes hiking, birding (Birdwatching), beachcombing and sightseeing.
The wetland marsh is a beautiful easy-access location for visitors to enjoy some wide-open spaces on Grand Manan Island complimented by scenery and popular for birding. Birdwatching may include sightings of Arctic Terns, Northern Gannets, Razorbills, Sooty Shearwaters, Atlantic Puffins, and Northern Fulmars.
A few of the more popular highlights, amenities and services located in and around the Castalia Marsh are viewing tower, beach, picnic area and information signs.