NSRF NYC Ugly Sweater 5K & HM
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Event overview
The NYC Ugly Sweater 5K & Half Marathon takes place on December 14, 2025, in Prospect Park, Brooklyn. The event offers both in-person and virtual participation options. A portion of event proceeds benefits the Never Stop Running Foundation, a 501(c)(3) nonprofit that supports youth and special needs running events and athlete development. Registration options include in-person and virtual entries, and an add-on bib mailing is available for a fee.
Course, distances and amenities
- 5K
- Half marathon (13.1 miles)
Both routes use a USATF certified circuit in Prospect Park. The 5K is one loop of the circuit. The half marathon is four loops of the same course and requires runners to cross the finish line on each loop for accurate split timing and photos. Half marathon entries receive live time tracking with predicted finish times and split photos. Course support for the half marathon ends after a published cutoff.
On-site amenities include an informal bag check area, nearby bathrooms and porta-johns, hydration at the finish, and post-race refreshments provided by All Round Foods and Waterloo Sparkling Water. Finish line photos and live online/email/text results are provided. Virtual participants may upload times and photos during the event week; race gear for virtual entries is shipped. Location reference: Park Side Ave & Parade Pl at the Peristyle/Grecian Shelter area of Prospect Park. Visit the organization's website for the most recent information.