Join Friends of Princeton Open Space for a fun and interactive scavenger hunt through the Billy Johnson Mountain Lakes Nature Preserve, Princeton’s “Central Park.” Led by FOPOS's summer interns, this guided adventure will take participants through some of the Preserve’s most fascinating natural and restored habitats. From the mysterious Devil’s Cave nestled in a boulder field to the thriving pollinator garden, you’ll discover the ecological diversity and hidden beauty that make this area so special.

Whether you're a longtime visitor or new to the Preserve, this scavenger hunt offers a fresh way to engage with the land, learn about local ecology, and have fun outdoors. All ages are welcome!

Meetup Location: Mountain Lakes House Parking Lot

Directions & 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 Google Maps & Apple Maps. 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 - fopos.org/waiver. 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.

FOPOS Scavenger Hunt: Wonders of Mountain Lakes Nature Preserve // 8.9.25