Date/Time
Date(s) - 09/13/2025
9:00 AM - 11:00 AM
Location
Community Park North Amphitheater
Registration is not open yet.
As of 3/25/2025, information shown is for 2024 event.
5K+ trail run and 3K walk at Billy Johnson Mountain Lakes Nature Preserve
Benefiting Friends of Princeton Open Space
PDF event information, directions, and course map.
Sponsorship information – link
Thank you to our sponsors.
Refreshments courtesy of McCaffrey’s Food Markets
Preregister. Limited to 200 Participants.
Entry: All on-line, no mail-in. Registration service fee applies to all entries.
Run and walk have same entry fees – choose your category on the form.
Walk is not timed, not competitive.
Through August 23: $33 includes T-shirt.
August 24 to September 11: $38 T-shirt on as-available basis.
After September 11: day-of entry fee may apply.
Preregistration encouraged. Sign up at the event will be $48.
Day-of registration is credit card only and subject to availability.
Scoring by Split Second Racing.
Depending on trail logistics, run may be chip timed at the finish. In this case, only gun time is reported.
Volunteer: Sign up online in the event crew category.
Event crew is a free registration – you will get a confirmation email. If you do not get the confirmation email, the sign up is not complete.
Course and Event Description:
5K+ trail run and walk comprising about 10% paved park trail, 30% unimproved service right-of-ways and 60% single track including moderately technical rocks, roots, logs, and whatever else nature has wrought in the woods.
Run timing may end at 55 minutes.
Walk is approximately 3K, includes paved park trail, service right-of-ways, easy single track. There is a creek crossing over stepping stones.
Due to the technical nature of the trail run, parents should consider whether the run event is appropriate for young children.
Event schedule
Sign-in time: 8:00 AM – 8:45 AM
Start: 9:00 AM
Contact: lakes@princetonac.org
About Friends of Princeton Open Space (FOPOS)
FOPOS is a nonprofit organization dedicated to acquiring open space in Princeton for preservation, protecting natural resources, maintaining accessibility to trails, and providing environmental education. Proceeds of this event will support the stewardship of the Mountain Lakes Preserve open space areas. To learn more, visit fopos.org