RunRace USA › Massachusetts › MammothMarch Boston
MammothMarch Boston
Saturday, June 5, 2027 · Hingham, MA
The race in 60 seconds
It is one of 6 races on the Massachusetts calendar that June.
What race day usually feels like
Based on the last three years, race week in June typically sees lows near 55°F and highs around 73°F: mild at the start, warm by the finish. Weather normals computed from Hingham-area conditions for race week, not the nearest big city.
Pacing the 20 Miles
Overall average pace for the 20 Miles, aid and rest stops included. Find your band before the start and let the first miles feel too easy.
| Finish time | Average pace | Feels like |
|---|---|---|
| 2:20 | 7:00 /mi | Front of the field |
| 3:10 | 9:30 /mi | Strong, steady effort |
| 4:00 | 12:00 /mi | Comfortable and conversational |
| 5:00 | 15:00 /mi | Every finish counts |
Common questions
When is MammothMarch Boston?
MammothMarch Boston is scheduled for Saturday, June 5, 2027.
Where is MammothMarch Boston held?
MammothMarch Boston is held in Hingham, Massachusetts. It is about 11 miles from South Boston.
What distances does MammothMarch Boston offer?
The listed distances are 20 Miles.
How do I register for MammothMarch Boston?
Registration is handled on the official race page, linked at the top of this listing. Entry can close early if the race sells out.
More races nearby
- Sep 6, 2026Beantown MarathonHingham · Marathon
- Nov 8, 2026South Shore Half MarathonHingham · Half Marathon
- Sep 6, 2026Beantown Marathon 2026 - WaitlistHingham · Marathon
- Oct 17, 2026SSCPS Annual Road Race 5KHingham · 5K
See every race on the Massachusetts calendar, or use the Race Finder for maps and filters.
Register for MammothMarch Boston →on Race Roster
Listing data refreshed nightly from the registration platform. Photos via Wikimedia Commons (CC BY-SA 3.0). Last template review July 2026. Spot an error? Tell us and we'll fix it fast.