YOURS TO EXPLORE. YOURS TO PROTECT.
Grass River Natural Area is a 1,492 acre nature preserve surrounding the Grass River, located in the heart of Antrim County. Along with the beautiful views of Grass River, we also offer seven miles of well-maintained trails including 1.5 miles of boardwalk floating above northern fen and cedar wetlands. With all of these natural features, Grass River Natural Area offers visitors an outdoor, living laboratory to explore and learn. The Grass River Center is open year-round, offering a comfortable learning environment for public programming, school field trips, camps, and more.
Boardwalks, hiking, education center, kayaking, skiing, snow-shoeing, birding...
Downed trees on trail?
Call 533-8576 or 533-8314
or report them here
Register for a class by clicking HERE.
WHAT DOES THE RIVER OTTER TELL US?
River otters are an amphibious mammal that are known for their curious nature, intelligence, and playfulness. Did you know they can act as environmental indicators (also called indicator species)? Contaminants that occur in the environment can concentrate in the otter over time in a process known as biomagnification. For this reason, river otters do not tolerate polluted waters and are typically found utilizing only high quality rivers and wetlands. Therefore the presence or absence of river otters in an ecosystem can serve as an indicator of habitat quality. The video below recorded a river otter family using the protected streams at Grass River - a sign of the health of the natural area and of your efforts to protect it!