Thielke Arboretum Glen Rock, NJ

Thielke Arboretum Glen Rock, NJ The Thielke Arboretum…a 16 acre nature oasis in the midst of suburbia…a hidden gem! For event tickets, please see our event pages for more information.

Thank you for supporting the Thielke Arboretum. The Thielke Arboretum in Glen Rock is a beautiful park, located right next to the Glen Rock Pool and athletic fields on Doremus Avenue. An Arboretum is, literally, a "Garden of Trees", where hundreds of Trees, Shrubs, Flowers, birds & other wildlife live. This nature center, right in Glen Rock, New Jersey, is an excellent place for a field trip or an easy nature walk.

If your child left this jacket at the Thielke Arboretum contact us via email to claim.
04/10/2026

If your child left this jacket at the Thielke Arboretum contact us via email to claim.

It's a perfect weekend to take a walk at Thielke Arboretum and we have a new Spring StoryWalk Up for families to enjoy!
04/04/2026

It's a perfect weekend to take a walk at Thielke Arboretum and we have a new Spring StoryWalk Up for families to enjoy!

Join us of this FREE event in partnership with the Glen Rock Environmental Commission and the Glen Rock Shade Tree Advis...
04/04/2026

Join us of this FREE event in partnership with the Glen Rock Environmental Commission and the Glen Rock Shade Tree Advisory Committee on Rethinking the Lawn. Registration recommended, as spots are limited.

Sticking around for Spring Break? Come to Thielke Arboretum as we reprise our popular Nature Crafters opportunity from t...
03/30/2026

Sticking around for Spring Break? Come to Thielke Arboretum as we reprise our popular Nature Crafters opportunity from this past summer. Free of charge and no registration required, it's easy to pair this with a walk of the grounds looking for signs of spring and some playground time.

Watch the Arboretum SPRING back to life with your child(ren) on Thursdays this April. Limited to 8 children (ages 2-4) w...
03/17/2026

Watch the Arboretum SPRING back to life with your child(ren) on Thursdays this April. Limited to 8 children (ages 2-4) with an adult caregiver. $10 per session (1 child, 1 adult), registration required. 4/9, 4/16, 4/23 from 10-10:45am.

Get your school-aged children out in nature on Thursday afternoons with Nature Explorers. Spring sessions offered 4/9, 4...
03/17/2026

Get your school-aged children out in nature on Thursday afternoons with Nature Explorers. Spring sessions offered 4/9, 4/16, and 4/23 from 4-5pm. This is a drop off program for ages 5-7. Younger siblings welcome to join if caregiver attends as well. Registration required - $10 per session.

On Saturday, February 14th you can partake in a global event without leaving Bergen County! Thielke Arboretum will be pa...
02/05/2026

On Saturday, February 14th you can partake in a global event without leaving Bergen County! Thielke Arboretum will be participating in the Great Backyard Bird Count and we welcome birders of all ages to join us. No registration required.

You can once again catch Friends of the Glen Rock Arboretum at Super Science Saturday in Ridgewood, New Jersey on Saturd...
02/05/2026

You can once again catch Friends of the Glen Rock Arboretum at Super Science Saturday in Ridgewood, New Jersey on Saturday, March 7th. Hands-on science for all ages.

Nature Explorers is back in February. This drop-off program for children ages 5-7 will allow younger children if a careg...
02/02/2026

Nature Explorers is back in February. This drop-off program for children ages 5-7 will allow younger children if a caregiver accompanies them. Enjoy the magic winter wonderland at Thielke Arboretum! Registration on our website.

Winter is a great time to explore Thielke Arboretum! Bundle up your little ones and join us for this season's Nature Spr...
01/21/2026

Winter is a great time to explore Thielke Arboretum! Bundle up your little ones and join us for this season's Nature Sprouts - Wednesdays from 10-10:45am on 2/4, 2/11, and 2/18. $10 per session (1 child, 1 adult). Register on our website.

All together with our lights, we make magic of the night! Yesterday, Thielke Arboretum hosted a Solstice Lantern Walk pa...
12/22/2025

All together with our lights, we make magic of the night! Yesterday, Thielke Arboretum hosted a Solstice Lantern Walk partnering with Let Wonder Lead, Bach to Rock Wyckoff, and Simon Toffell photography. Hot chocolate was generously provided for participants by the FOGRA board. Participants wandered through the woods and paused to sing together while the earliest sunset of the year descended around them. A lantern walk is a chance to slow down and appreciate how the incremental tiny additional moments of light that happen from here on out will eventually lead us through spring to summer. This free event was the capstone after a month of fundraising "Celebrate With Light" classes, which brought in $1,200 in donations to cover the cost of tree maintenance at Thielke Arboretum. A big THANK YOU to everyone who participated this season!

Address

460 Doremus Avenue
Glen Rock, NJ
07452

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