Friends of Princeton Open Space

Friends of Princeton Open Space Preserving land in the greater Princeton region, restoring degraded ecosystems, stewarding the land, maintaining trails, and providing environmental education.

Volunteer with us and be a part of our mission!

Look what’s blooming at the Preserve! 🌸Late summer is putting on quite a show along the trails. Keep an eye out for whit...
09/01/2026

Look what’s blooming at the Preserve! 🌸

Late summer is putting on quite a show along the trails. Keep an eye out for white wood aster, cardinal flower, late-flowering boneset, and blue mistflower adding beautiful pops of color to the landscape.

These native wildflowers provide important food and habitat for pollinators and other wildlife as the growing season winds down. 🐝🦋

Next time you’re out on the trails, take a closer look at the beautiful late summer blooms!

🌱 Hands-on conservation in action with first-year Princeton University students!Yesterday, we welcomed first-year studen...
08/27/2026

🌱 Hands-on conservation in action with first-year Princeton University students!

Yesterday, we welcomed first-year students from the Community Action program at Princeton University’s Pace Center for Civic Engagement!

As part of their service experience at the Preserve, these student volunteers helped reclaim native plants from encroaching invasive vines in the forest restoration site. Oaks, maples, St. John’s wort, and mountain mint were among the native species they helped uncover and care for. In many cases, the plants had outgrown their protective cages, and volunteers helped remove the cages so these plants could continue to thrive.

Restoring these natural areas supports native plants and improves wildlife habitat. It also protects water quality, strengthens climate resilience, preserves spaces for passive recreation and experiential environmental education, and supports community well-being and public health.

🌿 We’re grateful to these students for spending part of their orientation getting their hands dirty and contributing to the impactful work that FOPOS is undertaking. Welcome to Princeton and we hope to see you back at the Preserve this semester!



Pace Center for Civic Engagement, Princeton University

🌺 Look What’s Blooming!Cardinal flower (Lobelia cardinalis) is putting on a brilliant show at the Preserve! Its vivid re...
08/18/2026

🌺 Look What’s Blooming!

Cardinal flower (Lobelia cardinalis) is putting on a brilliant show at the Preserve! Its vivid red flowers are a favorite of hummingbirds, which help pollinate the blooms as they feed on nectar.

Cardinal flower thrives in wet areas along streams, ponds, and wetlands, making it an important native plant for our local ecosystem. ❤️

A Rare Green Heron Gathering! 🪶💚Three Green Herons have been hanging out just south of the dam on the east side of the l...
08/13/2026

A Rare Green Heron Gathering! 🪶💚

Three Green Herons have been hanging out just south of the dam on the east side of the lake, and they’ve been a wonderful sight to see!

This time of year, young Green Herons may stick close to their parents for a month or more while they learn to forage and practice their hunting skills. Seeing three together like this is a special treat!

Keep an eye out for them through September, especially around the area just south of the dam.

📸 Photo credit: Matt Sikorski

🎟️ FALL FEST TICKETS ARE ON SALE! 🌿Join us Saturday, September 19, from 4 to 6 PM at Mountain Lakes House for our annual...
08/10/2026

🎟️ FALL FEST TICKETS ARE ON SALE! 🌿

Join us Saturday, September 19, from 4 to 6 PM at Mountain Lakes House for our annual Fall Fest fundraiser!

🎶 Live music
🌱 Delicious fall food + plant-based options
🍻 Craft beverages
🌻 Nature-themed fun

Your ticket helps support our paid internship program, giving local college students hands-on experience in conservation and environmental stewardship. 💚

🎟️ Early Bird: $60 through Sept. 12
🎟️ General Admission: $70 starting Sept. 13
👧 Kids 12 & under: FREE (registration required)

👉 Use the link in bio to get your tickets

Sponsorship opportunities available

Come celebrate the season, enjoy the lake, and help grow the next generation of environmental stewards! 🌳

A huge thank you to all of the amazing volunteers who came out today! 🌿💚Together, we helped maintain the protective cage...
08/05/2026

A huge thank you to all of the amazing volunteers who came out today! 🌿💚

Together, we helped maintain the protective cages around our native plants, giving them a better chance to thrive while continuing our efforts to restore our local habitat.

Want to get involved? Join us this Saturday! We have two volunteer sessions:
🕘 9:00–11:00 AM
🕛 12:00–2:00 PM

Come lend a hand as we nurture native plants, remove invasive species, and make a lasting difference for our environment. Whether you're a returning volunteer or joining us for the first time, we'd love to see you there! Register at fopos.org/getinvolved or click the VOLUNTEER link in our bio.

🌿 Happy National Intern Day! 🌿Today we're giving a big shoutout to our incredible 2026 FOPOS interns! We are pleased to ...
07/30/2026

🌿 Happy National Intern Day! 🌿

Today we're giving a big shoutout to our incredible 2026 FOPOS interns! We are pleased to host both high school students through the Municipality's Summer Youth Employment Program and college-aged interns, who bring enthusiasm, curiosity, and dedication to everything they do.

This summer, they've helped lead stewardship sessions and nature walks, conducted beech tree health surveys, organized citizen science events, and contributed to so much more. Their hard work has helped connect our community with the natural world while caring for the lands we all enjoy.

We're proud to support the next generation of environmental leaders and grateful for the passion, energy, and fresh perspectives our interns bring to FOPOS. Thank you for making such a meaningful impact this summer; we can't wait to see all that you'll accomplish in the future! 💚

📚 You're invited to the FOPOS Nature Book Club! 🌿New members are always welcome!Join us on Friday, August 7, from 10:30 ...
07/30/2026

📚 You're invited to the FOPOS Nature Book Club! 🌿

New members are always welcome!

Join us on Friday, August 7, from 10:30 AM to 12:00 PM at Mountain Lakes House as we discuss Wild Dark Shore by Charlotte McConaghy. After the book discussion, stay for a special demonstration on native seed collection and propagation.

The FOPOS Nature Book Club, presented in partnership with the Princeton Public Library and the Princeton Environmental Film Festival, explores books about conservation, stewardship, and our relationship with the natural world.

Friday, August 7, 2026
🕥 10:30 AM to 12:00 PM
📍 Mountain Lakes House

Registration is through the Princeton Public Library; you do not need a library card to sign up. Check the events link in our bio or visit https://princetonlibrary.libnet.info/event/16755707

Come for the conversation, connect with fellow nature lovers, and discover new ways to care for the landscapes we share. We hope to see you there!

Address

57 Mountain Avenue
Princeton, NJ
08540

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