Embrace the whimsical spirit of winter trail running at the Squatchy Onesiefest 5K, set for February 14, 2026, in Mahwah, NJ. This unique event, hosted by Sassquad Trail Running in partnership with the New York-New Jersey Trail Conference, invites runners and hikers to don their favorite onesies for a memorable "trail party" through the scenic Ramapo Valley County Reservation. All participants receive a handcrafted finisher's medal, and those sporting a onesie are eligible for awards given to the top three male, female, and non-binary finishers.

The course features a beginner-friendly 1.60-mile "lollipop" loop around the picturesque Scarlet Oak Pond, which 5K participants will complete twice. Described as flat and not technical, the route primarily follows wide gravel and packed-dirt trails, with a short singletrack section connecting to the start/finish area. Road shoes are generally suitable, though winter traction recommendations may be provided closer to race day. The starting elevation is 246 feet, with 95% of the course on un-paved trails. Typical race day conditions in mid-February include highs around 41F and lows around 24F, with a low 11% chance of precipitation, making your cozy onesie a practical choice for warmth.

Starting and finishing at the NYNJTC Headquarters, the event ensures runner support with an aid station providing water, Skratch hydration, and snacks; participants are encouraged to bring their own cup or bottle. Restrooms are available in the Ramapo Valley County Reservation parking lot, a short walk from check-in, and private changing tents are provided. Known for its fun atmosphere and welcoming nature, especially for new trail enthusiasts, the Squatchy Onesiefest 5K is capped at 200 participants, guaranteeing an intimate and enjoyable experience.