Oak Ridge to Kingston Express O2K Marathon
Race Day Weather
Cool start, warming up steadily
Runners will face temperatures starting at 41°F and rising to 50°F by the finish. A light headwind will be present during miles 1-13, requiring a conservative pacing strategy, while a beneficial tailwind will assist from miles 14-25. With humidity averaging 70%, hydration should be prioritized throughout the race. Light gear is recommended for the pre-race wait as feels-like temperatures may drop to 38°F.
Pace Calculator
Get forecast alerts for Oak Ridge to Kingston Express O2K Marathon
We'll text or email you when the forecast shifts — so you can adjust gear, pacing, and strategy. Max one per day.
Race Info
The Oak Ridge to Kingston Express is a Boston-qualifier-focused marathon and half marathon in Oak Ridge, Tennessee, held in late February or early March. Both start on North Jefferson Circle and follow the Oak Ridge Turnpike, which has a bike lane and shoulder. The marathon is an out-and-back on a USATF-certified course with under 600 feet of climbing, and the half is a point-to-point with under 400 feet. Entry is capped at 50 runners and there are no shirts or awards. Source