Harborside Half Marathon
Race Day Weather
Cool start — fast day potential, moderate wind
A cool 47°F at the start line is ideal for fast times — expect to warm up quickly once you're moving. Moderate winds around 16mph may affect pacing on open sections of the course. Moderate humidity at 69% is worth noting for effort level, especially in later miles.
Pace Calculator
Enter a finish time to see what race day does to it.
Get forecast alerts for Harborside 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 Harborside Half Marathon race plan
A mile-by-mile breakdown of where your time goes, weather-adjusted splits, fueling timeline with aid stations, packing checklist, carb tracker, spectator guide, all built around your goal and race-day conditions.
Race Info
The Harborside Half Marathon and 5K runs each November through Newburyport, Massachusetts, starting at Mark Richey Woodworking on Parker Street and finishing at Cashman Park on the Merrimack River. The half marathon route heads out through Newbury and West Newbury before returning along the Clipper City Rail Trail for its final 1.3 miles. The race has run annually since 2015, is USATF-certified, and sold out six weeks ahead of race day in 2025.
