Greenwich Half Marathon
Race Day Weather
Warm start, adjust pace early
Runners will face temperatures starting at 65°F and rising to 70°F. With humidity at 79% and a light headwind from the NE, pacing adjustments will be crucial. Given the chance of light rain, hydration should be prioritized, and runners should consider starting conservatively to manage the heat.
Pace Calculator
Get forecast alerts for Greenwich Half 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 Greenwich Half Marathon is an inaugural race held at Greenwich Point Park (Tod's Point) in Old Greenwich, Connecticut, organized by the nonprofit running club Greenwich Road Runners. The certified two-loop course is flat, with only 40 feet of elevation gain, and runs along Long Island Sound through Greenwich Point Park and the Old Greenwich village business district. The race benefits Kids in Crisis, a local charity providing crisis intervention and counseling services.