Friends of the Glen Rock Arboretum, Inc. is committed to preserving, developing and the continued existence of the arboretum in Glen Rock, NJ, a designated wetland forest; and to the conservancy of its native plants and natural habitats for wildlife. 

The Thielke Arboretum of Glen Rock depends solely on donations and volunteers to operate, preserve, and maintain the arboretum, and offer programs such as the annual Fishing Derby, Nature Journaling, New Jersey State Standards based programs, and all the other wonderful events. The Arboretum has 501(c)3 status and is approved by many corporations for Corporate matching. Donations directly go to the care of the Glen Rock Thielke Arboretum. 
Please consider donating now​.

Also, Amazon will donate 0.5% of the price of your eligible AmazonSmile purchases to Friends of the Glen Rock Arboretum Inc whenever you shop on AmazonSmile
The Thielke Arboretum of Glen Rock is a serene oasis in the midst of a busy suburbia.  The arboretum is a wetland forest, with nature trails, gardens, a spring fed pond, and a sparkling brook.  The arboretum's eleven acres support many species of trees and plants, the majority of which are native to this area.   The arboretum also has many trees recommended by Rutgers, the State University, for planting in New Jersey residential landscapes.  The arboretum is a natural habitat for birds, butterflies, amphibians and a water fowl as well as other native inhabitants of the animal kingdom.

The antique Gazebo, located at the end of the 2000 Millennium kousa dogwood allee is a popular site for special occasions and celebrations. The Thielke Arboretum has a well rounded education program, offering New Jersey Core Curriculum based nature tours, for grades pre-kindergarten through high school science classes, and environmental groups  as well as  nature tours for adults and visitors. Tours are led by knowledgeable volunteer docents.

We hate to see you miss a program you have signed up for, but we know things do happen.
Check out our Cancellation Policy

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