www.sassquadtrailrunning.com

Frosty Fat Sass

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West Orange, New Jersey, United States

calendar_today 31 Jan, 2026

nordic_walking Others

directions_run Running

About the Event

Embrace the OG spirit of grassroots trail running at a uniquely stripped-back winter celebration. The 9th Annual Frosty Fat Sass returns on Saturday, January 31, 2026, offering a choose-your-own-adventure format with 3-hour, 6-hour, and 5k options on a challenging 5k loop through New Jersey's South Mountain Reservation. This quintessential "fat ass" event is all about the pure joy of the trails—no swag, no aid station food (bring your own!), just a festive community gathering where every loop supports the vital conservation work of the South Mountain Conservancy. Experience the raw, welcoming atmosphere that launched the entire Sassquad movement, where the only competition is with yourself and the winter chill. It's the perfect antidote to over-commercialized racing—a true trail party where the woods, the camaraderie, and the shared stoke are the only rewards. Sign up for a genuine, back-to-basics winter adventure.

Races Offered

3 hours

Jan 31, 2026

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Distance — 3H

terrain

Type — Others, Running

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-24 days remaining

5 km

Jan 31, 2026

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Distance — 5K

terrain

Type — Others, Running

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-24 days remaining

6 hours

Jan 31, 2026

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Distance — 6H

terrain

Type — Others, Running

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-24 days remaining

Weather Overview

These values represent the 3-year monthly averages for January in West Orange.

Temp (°C)

Feels Like (°C)

thermostat -2.4° / 5.1°

wb_sunny -7.4° / 0.8°

Wind (km/h)

Humidity (%)

air 11.9 /

water_drop 69.3%

Temp (°C)

Feels Like (°C)

Wind (km/h)

Humidity (%)

thermostat -2.4° / 5.1°

wb_sunny -7.4° / 0.8°

air 11.9 km/h

water_drop 69.3%

About West Orange

Learn more about the host city, West Orange.

West Orange is a suburban township in Essex County, in the U.S. state of New Jersey. As of the 2020 United States census, the township's population was 48,843, an increase of 2,636 (+5.7%) from the 2010 census count of 46,207, which in turn reflected an increase of 1,264 (+2.8%) from the 44,943 counted in the 2000 census.