Lace up for the Frosty Fat Sass, a vibrant "Trail Party" returning for its 9th annual edition on January 31, 2026, in West Orange, NJ. This beloved event, an "OG" race for Sassquad Trail Running, offers a unique challenge with 6-hour, 3-hour, and 5K distances, plus a Kids 1M and a new Rucking Division for the 3-hour event. Held at the scenic South Mountain Reservation, starting and finishing at the Turtleback Rock Picnic Area, runners can expect typical race day conditions with highs around 39F and lows near 22F, and a small chance of precipitation.

The 5K loop course is a dynamic blend of terrain, featuring mellow carriage roads and technical singletrack with roots and rocks. Each loop boasts approximately 289-300 feet of elevation gain, including a rocky 200+ ft descent at mile one and a 100 ft climb at mile 2.5. It's an ideal introduction to trail running, with a well-marked course guiding you through the winter landscape. As a "Fat-Sass" event, runners are self-supported, bringing their own fuel and hydration, though water coolers and essential first aid are provided at the start/finish area.

More than just a race, the Frosty Fat Sass is a community gathering that supports a great cause, with funds raised benefiting the South Mountain Conservancy. Expect a festive atmosphere, complete with a family-friendly start/finish area featuring picnic tables and games. Whether you're aiming for multiple loops in the timed events or tackling the 5K, the Frosty Fat Sass promises a challenging yet enjoyable experience on the trails of West Orange.