Available distances
About
Harborside Half Marathon & 5K takes place in Newburyport, Massachusetts, on November 8, 2026. The half marathon (13.1 miles) starts at 9 a.m. and the 5K at 9:15, on a route through classic New England scenery in the middle of fall. The morning ends with a post-race celebration serving pizza, snacks and craft beer for those of legal drinking age.
A late-morning start is unusual and genuinely useful: you can eat a normal breakfast, warm up without rushing and still be finished by lunch. On the road side, the half rewards a 12-week build with one long run a week and a couple of steady-effort sessions at goal pace, while the 5K works as a hard, honest test of current fitness. Runners doing both distances across a season often use an event like this to sharpen speed before turning to a longer winter target.
Highlights
- Seaside
- Off-road
Prepare for Harborside Half Marathon & 5K with RunRun
An AI-generated training plan, adjusted every week based on your real sessions. Built around your goal, current level and race date.
- Personalized plan based on your VO2max, history and weekly availability
- Strava and Garmin sync: your sessions are analyzed and the plan adapts
- Target paces, long runs, key sessions: everything is calculated for race day
Races nearby
Other upcoming races around Newburyport.
PortRun Half Marathon & 5K
Sep 27, 2026 · Newburyport · 1 mi away
13.1 mi · 3.1 mi
Apple Harvest Run - MA
Oct 18, 2026 · West Newbury · 5 mi away
5 mi · 3.1 mi · 1 mi
Smuttynose Rockfest Half Marathon
Oct 4, 2026 · Hampton · 9 mi away
13 mi · 3.1 mi
New England Ostomy 5k
Oct 4, 2026 · Rye Beach Village District · 12 mi away
3.1 mi
Around Cape Ann Half Marathon
Oct 18, 2026 · Gloucester · 16 mi away
13.1 mi
Half Marathon-by-the-Sea
Sep 13, 2026 · Manchester-by-the-Sea · 17 mi away
13.1 mi