FOPOS Trail Crew Volunteer Session // 7.31.25

Friends of Princeton Open Space(FOPOS), founded in 1969, is a non-profit, tax-exempt organization devoted to acquiring open space in Princeton for preservation, protecting natural resources, maintaining accessibility to trails, and providing environmental education. Throughout the Princeton region, FOPOS works with groups to support efforts to preserve and protect open space and the environment.Since its founding, FOPOS has helped to establish over 1,800 acres of parkland and a network of trails that nearly encircles Princeton.  Through grants and the contributions of hundreds of people in the community, FOPOS has helped raise nearly $10 million for the purchase of land and acquisition of easements on properties that might have been bulldozed for development.  In addition to land preservation, FOPOS also leads in stewardship, from creating and maintaining hiking trails, boardwalks and footbridges, to the removal of invasive species and the replanting of native varieties.FOPOS also sponsors community programs and activities, such as nature walks and educational workshops, and advocates for governmental actions that protect our water, land, animals and plant communities. If you have an interest in spending time outdoors, enjoying nature and making a difference in the community, please contact us at info@fopos.org to get involved in trail-building and ecological restoration.

Friends of Princeton Open Space

Join FOPOS for a volunteer session at the Billy Johnson Mountain Lakes Nature Preserve.

Mountain Lakes House

Join the Friends of Princeton Open Space (FOPOS) for a trail crew volunteer session on Thursday, July 31st, from 9 AM - 11 AM.Volunteers will work under the guidance of the FOPOS stewardship staff to help monitor and maintain the trails at the Billy Johnson Mountain Lakes Nature Preserve. Volunteers will assist with trail maintenance tasks such as clearing overgrown vegetation, monitoring for fallen trees, and picking up litter. No prior experience is necessary... just a willingness to get your hands dirty and make a positive impact!Meetup Location: Mountain Lakes House Parking LotDirections &amp; Parking: We will meet at the Mountain Lake House parking lot, located within the Billy Johnson Mountain Lakes Nature Preserve. Here is a link to the parking lot location on <a href="https://www.google.com/maps/place/Parking+lot,+Princeton,+NJ+08540/@40.3633252,-74.678648,717m/data=!3m1!1e3!4m6!3m5!1s0x89c3e69a822d366f:0x7d2312827f4d8ea3!8m2!3d40.3627034!4d-74.6754476!16s%2Fg%2F11cpn4ll96?entry=ttu&amp;g_ep=EgoyMDI1MDYyMy4yIKXMDSoASAFQAw%3D%3D" title="https://www.google.com/maps/place/Parking+lot,+Princeton,+NJ+08540/@40.3633252,-74.678648,717m/data=!3m1!1e3!4m6!3m5!1s0x89c3e69a822d366f:0x7d2312827f4d8ea3!8m2!3d40.3627034!4d-74.6754476!16s%2Fg%2F11cpn4ll96?entry=ttu&amp;g_ep=EgoyMDI1MDYyMy4yIKXMDSoASAFQAw%3D%3D" target="_blank" data-msys-clicktrack="0" rel="nofollow noopener noreferrer">Google Maps</a> &amp; <a href="https://maps.apple.com/place?map=explore&amp;place-id=I8FD7F90A0B23B18F&amp;address=57+Mountain+Ave%2C+Princeton%2C+NJ++08540%2C+United+States&amp;coordinate=40.3633412%2C-74.6760686&amp;name=The+Mountain+Lakes+House&amp;_provider=9902" title="https://maps.apple.com/place?map=explore&amp;place-id=I8FD7F90A0B23B18F&amp;address=57+Mountain+Ave%2C+Princeton%2C+NJ++08540%2C+United+States&amp;coordinate=40.3633412%2C-74.6760686&amp;name=The+Mountain+Lakes+House&amp;_provider=9902" target="_blank" data-msys-clicktrack="0" rel="nofollow noopener noreferrer">Apple Maps</a>. The address of the Preserve is 57 Mountain Avenue, Princeton, NJ 08540; this will bring you to the entrance of the Preserve, not our meet-up location. To get to the Mountain Lakes House parking lot, look for the white gate along Mountain Avenue, marked by a series of black mailboxes along the road. Drive slowly down the long paved driveway. The gravel parking lot will be on your left, approximately 1/2 mile down the driveway.Event waiver: Please complete this event waiver - <a href="http://fopos.org/waiver" title="http://fopos.org/waiver" target="_blank" data-msys-clicktrack="0" rel="nofollow noopener noreferrer">fopos.org/waiver</a>. This needs to be completed once per calendar year.About FOPOS: Founded in 1969, FOPOS has been working to preserve and protect natural spaces in the greater Princeton area for more than 50 years. As a part of our work, we rely on volunteers to help make progress when it comes to restoration work, such as our current forest and riparian restoration projects in the Billy Johnson Mountain Lakes Nature Preserve.Can't make this session? <a href="https://www.fopos.org/support-us" title="https://www.fopos.org/support-us" target="_blank" data-msys-clicktrack="0" rel="nofollow noopener noreferrer">Consider making a donation</a> to show your love for our local environment! All donations support our year-round stewardship work.Looking to register for multiple volunteer sessions this summer? Register <a href="https://form.jotform.com/251338505819158" title="https://form.jotform.com/251338505819158" target="_blank" data-msys-clicktrack="0" rel="nofollow noopener noreferrer">HERE</a>.

FOPOS Land Stewardship Volunteer Day // Saturday, May 30th

FOPOS Spring Bird Walk with Winnie Hughes Spar // Saturday, June 6th

FOPOS Foraging Invasives as Stewardship: Mugwort // Sunday, June 7th

FOPOS Nature Journaling Meetup  // Monday, June 8th

FOPOS Land Stewardship Volunteer Day // Saturday, June 13th

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FOPOS Trail Crew Volunteer Session // 7.31.25

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FOPOS Land Stewardship Volunteer Day // Saturday, May 30th

FOPOS Spring Bird Walk with Winnie Hughes Spar // Saturday, June 6th

FOPOS Foraging Invasives as Stewardship: Mugwort // Sunday, June 7th

FOPOS Nature Journaling Meetup // Monday, June 8th

FOPOS Land Stewardship Volunteer Day // Saturday, June 13th

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FOPOS Trail Crew Volunteer Session // 7.31.25

More events from Friends of Princeton Open Space

Discover more events from Friends of Princeton Open Space, from Charity & Causes to other experiences you might love.

FOPOS Land Stewardship Volunteer Day // Saturday, May 30th

FOPOS Spring Bird Walk with Winnie Hughes Spar // Saturday, June 6th

FOPOS Foraging Invasives as Stewardship: Mugwort // Sunday, June 7th

FOPOS Nature Journaling Meetup // Monday, June 8th

FOPOS Land Stewardship Volunteer Day // Saturday, June 13th

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