Races Half marathon · Marshfield, USA
Run to the Rock Half Marathon
Run to the Rock Half Marathon is a flat half marathon in Marshfield, USA, held each September. The half marathon heads north into North Marshfield as far as the North River along Union Street. Race listings describe the course as very flat with almost no net elevation change. Early September on the Massachusetts coast is usually mild, around 14 to 25°C, with the odd humid or breezy morning. On a course as flat as Run to the Rock Half Marathon, even splits are everything; the classic mistake is banking time in the first third.
Page rebuilt 2026-11-14 · race facts not independently verified — confirm dates and entries on the official race site
When
September
every year
Course
flat
Half marathon
Conditions
Early September on the Massachusetts coast is usually mild, around 14 to 25°C, with the odd humid or breezy morning.
Racing this course well
The half marathon heads north into North Marshfield as far as the North River along Union Street. Race listings describe the course as very flat with almost no net elevation change.
On a course as flat as Run to the Rock Half Marathon, even splits are everything; the classic mistake is banking time in the first third.
Getting a place
- How you get in
- Open entry: first come, first served
- Price
- From $65 early bird, rising to $75 and then $85 in race week (2026 race)
Official Run to the Rock Half Marathon site →Checked November 2026
Race day
- Start time
- 08:00
- Time limit
- 3 hours
- Also on the day
- 10k, 5k
The course in numbers
- Course status
- USATF sanctioned
Worth knowing
- All distances start and finish at Furnace Brook Middle School.
Pick your goal for Marshfield
Pace charts, weekly structure and timelines for the most common half marathon goals:
We don’t hold a confirmed date for this edition, so any countdown comes from the date you enter here.
Build your training around Run to the Rock Half Marathon.
RunV works backwards from race day to today. Your plan adapts when life interrupts, and you approve every change. It does not adapt to this specific course — the pacing guidance above is where the course knowledge is.
Everything above stays free and complete — this is an optional next step, not a paywall.
Asked often
- When is the Run to the Rock Half Marathon?
- It is held each September in Marshfield, USA. Check the official Run to the Rock Half Marathon site for the exact date and entry windows.
- Is the Run to the Rock Half Marathon course flat?
- The half marathon heads north into North Marshfield as far as the North River along Union Street. Race listings describe the course as very flat with almost no net elevation change.
- How do I enter the Run to the Rock Half Marathon?
- Open entry: first come, first served. Price: From $65 early bird, rising to $75 and then $85 in race week (2026 race).
- How should I train for the Run to the Rock Half Marathon?
- Train specifically for Marshfield — terrain, conditions, goal pace — and let the plan flex around real life. With RunV Premium you can adapt your plan to fit your week.
Not sure what to target? Predict your half marathon time from a recent race →
More half marathon races
Supplements research for this distance
Build for Marshfield — around your actual life
RunV engineers your block backwards from race day in September — and adapts it when training doesn't go to script. You approve every change.
