BestRacesroad · 10K · 1-mile dash · 5K
45th Annual YMCA Hair of the Dog Run
Build your free race-day pace plan| Distances | 10K, 1-mile dash, 5K |
| Surface | road |
| Field size | 130 runners |
| Founded | 1983 (43 years) · from the race's own edition count |
| USATF certified | Yes |
| Boston qualifier | No |
From the race's RunSignup listing, with field size from its posted results, last updated September 15, 2026.
Running 45th Annual YMCA Hair of the Dog Run for a cause? Set up a free team page — rally your people, point donations straight to your charity.
Race-day weather
What the weather did on January 1 in each of the last 5 years, measured at Spartanburg 3 Sse, 2.2 miles from Spartanburg.
| Year | High | Low | Rain |
|---|---|---|---|
| 2026 | 59°F | 25°F | none |
| 2025 | 63°F | 35°F | none |
| 2024 | 53°F | 30°F | none |
| 2023 | 59°F | 46°F | none |
| 2022 | 75°F | 62°F | 0.62 in |
Daily highs and lows, not start-line temperatures: most races start in the cool of the morning, closer to the low. Source: NOAA National Centers for Environmental Information, GHCN-Daily.
Stay near Spartanburg
Hotels and rentals in and around Spartanburg, SC.
Preset to race weekend, Dec 31, 2026 – Jan 2, 2027.
Bookings made through this map may earn BestRaces a commission. It has no effect on rankings (how ranking works).
Race Pace Analyzer beta
Build your 45th Annual YMCA Hair of the Dog Run splits
This one already knows the course. Give it your goal time and it gives you every split to the finish, adjusted for this race's terrain and its usual race-morning temperature, plus a fueling plan and a check on whether the goal fits your fitness. It's free, and there's nothing to sign up for.
- Already loaded
- 2 distances
- ≈45°F on January race mornings
| Mile | Split | Elapsed |
|---|
Training paces for this goal
The everyday paces that build the fitness behind your goal, worked out from your target with the Daniels VDOT model. Save these for your next training block.
Treat these as a guide. Run easy days by feel, and adjust for heat, hills and how your legs feel that day.
Racing more than this one?
The BestRaces email: the races our numbers say are worth the trip, and a heads-up when your race week arrives.
Beta. The splits are exact math on your goal time. The terrain and weather notes are estimates from this race's listing, not a forecast.
Run this one?
Tell other runners it's worth the entry fee. One tap, no email, no account.
Votes don't affect the ranking. Here's what does →