BestRaces| Distances | 10K, 5K |
| Surface | road |
| Field size | 359 runners |
| USATF certified | No |
| Boston qualifier | No |
From the race's RunSignup listing, with field size from its posted results, last updated October 26, 2026.
Running =PR= Races: South Lakes 10K & 5K for a cause? Set up a free team page — rally your people, point donations straight to your charity.
Stay near Reston
Hotels and rentals in and around Reston, VA.
Preset to race weekend, Sep 25 – 27.
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 =PR= Races: South Lakes 10K & 5K 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
- ≈60°F on September 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 →