RunRace USA › Massachusetts › Seth's Fat Ass 50K
Seth's Fat Ass 50K
Springfield, Massachusetts · Saturday, December 12, 2026 · 50K
Official race page & registration ↗Saves stay on this device. Calendar entries use the listed date; confirm your distance and start time with the organizer.
Seth's Fat Ass 50K takes place on Saturday, December 12, 2026 in Springfield, Massachusetts. The race is run over 50K. For anyone travelling in, Worcester is about 41 miles away.
It is one of 35 races on the Massachusetts calendar that December. The 50K is rare in Massachusetts: only one race on the calendar offers it.
- Date
- Saturday, December 12, 2026
- Location
- Springfield, Massachusetts
- Distances
- 50K
Listing from the 2026 race calendar, refreshed nightly. Details can change: confirm date and entry on the official race page before travelling. Spot an error? Correct this listing.
Making a race weekend of it?
Stay near the start line in Springfield: check in Dec 11, out Dec 13.
Common questions
When is Seth's Fat Ass 50K?
Seth's Fat Ass 50K is scheduled for Saturday, December 12, 2026.
Where is Seth's Fat Ass 50K held?
Seth's Fat Ass 50K is held in Springfield, Massachusetts. It is about 41 miles from Worcester.
What distances does Seth's Fat Ass 50K offer?
The listed distances are 50K.
How do I register for Seth's Fat Ass 50K?
Registration is handled on the official race page, linked at the top of this listing. Entry can close early if the race sells out.
More races nearby
Within about 60 miles, ordered by approximate straight-line distance between listed locations.
- Nov 28Wolf Swamp Turkey Trot 5K Run/WalkLongmeadow, MA
- Nov 27Run Like KatLongmeadow, MA
- Jul 17Springfield DB Race PaymentSpringfield, MA
- Nov 2615th Annual Stuffing the Pantry 5k Run/WalkEast Longmeadow, MA
- Nov 7Miles for a Mission T1D 5kEast Longmeadow, MA
See every race on the Massachusetts calendar, Massachusetts Ultras, or use the Race Finder for maps and filters.