JELL-O Half Marathon
Race Day Weather
Cool start — fast day potential, warming through the race
A cool 50°F at the start line is ideal for fast times — expect to warm up quickly once you're moving. Temperatures rising to 64°F through the course will gradually increase perceived effort in the second half. Light winds shouldn't be a major factor for pacing. Moderate humidity at 72% is worth noting for effort level, especially in later miles.
Pace Calculator
Get forecast alerts for JELL-O Half Marathon
We'll text or email you when the forecast shifts — so you can adjust gear, pacing, and strategy. Max one per day.
Get your personalized JELL-O Half Marathon race plan
True Effort pacing, weather-adjusted mile splits, fueling timeline with aid stations, packing checklist, carb tracker, spectator guide — all personalized to your goal and race-day conditions.
Race Info
The JELL-O Half Marathon & 7K takes place in Le Roy, New York, the town where the Jell-O brand was invented in 1897. The course runs on paved country roads with minimal elevation change and finishes at the Jell-O Brand Museum's Jell-O Barn. First held in 2022, the race benefits the LeRoy Backpack Club and includes a post-race party with food and music.
