Short review
The 4K Trail Run is the most unique race in Boston! Taking place on Cathleen Stone Island in the Boston Harbor, teams and individual runners will enjoy an afternoon and evening with their coworkers and friends. After a short ferry ride (~30 minutes) to the island, the event will kick off with a 4K race through the island and end with dinner, beer, and an on-island party.
Every dollar raised from the 4K Trail Run supports Cathleen Stone Island's mission to deliver free, hands-on science learning to Boston's youth. The 4K Trail Run is an excellent way to invest in education of Boston youth and is our most popular corporate fundraising event. This year’s 4K Trail Run will take place on Wednesday, May 21st, and Thursday, May 22nd, 2025 (Teams and runners must select one day to participate).
Road Running , Walk , Vertical race
Distance:
Less than 5K
Organized since 2019
Short review
The 4K Trail Run is the most unique race in Boston! Taking place on Cathleen Stone Island in the Boston Harbor, teams and individual runners will enjoy an afternoon and evening with their coworkers and friends. After a short ferry ride (~30 minutes) to the island, the event will kick off with a 4K race through the island and end with dinner, beer, and an on-island party.
Every dollar raised from the 4K Trail Run supports Cathleen Stone Island's mission to deliver free, hands-on science learning to Boston's youth. The 4K Trail Run is an excellent way to invest in education of Boston youth and is our most popular corporate fundraising event. This year’s 4K Trail Run will take place on Wednesday, May 21st, and Thursday, May 22nd, 2025 (Teams and runners must select one day to participate).
September 19, 2020
The race starts at 00:004 km
from $25
September 19, 2020
The race starts at 16:004 km
from $75
September 22, 2021
The race starts at 09:004 km
from $45
September 29, 2021
The race starts at 16:004 km
from $0
September 30, 2021
The race starts at 16:004 km
from $0
September 29, 2021
The race starts at 16:004 km
from $85
May 22, 2024
The race starts at 16:004 km
from $95
May 22, 2024
The race starts at 16:004 km
from $0
May 23, 2024
The race starts at 16:004 km
from $0
May 23, 2024
The race starts at 16:004 km
from $95
May 21, 2025
The race starts at 16:004 km
from $95
May 21, 2025
The race starts at 16:004 km
from $0
May 22, 2025
The race starts at 16:004 km
from $95
May 22, 2025
The race starts at 16:004 km
from $0
August 30, 2020
The race starts at 16:00
from $0
September 06, 2020
The race starts at 16:00
from $0
September 13, 2020
The race starts at 16:00
from $0
August 30, 2020
The race starts at 16:00
from $0
September 06, 2020
The race starts at 16:00
from $0
September 13, 2020
The race starts at 16:00
from $0
Weather for May 21, 2025
°F
Wind: m/s.
.
Very Good for running
Past weather
Sep 19, 2020
65.08 °F, wind 9.51m/s
Mostly cloudy throughout the day..
Sep 22, 2021
68.78 °F, wind 2.94m/s
Partly cloudy throughout the day..
May 25, 2022
62.57 °F, wind 7.96m/s
Partly cloudy throughout the day..
May 24, 2023
°F, wind m/s
.
May 22, 2024
°F, wind m/s
.
Feb 19, 2025
°F, wind m/s
.
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What to wear on your run?
We recommend checking the official website for up-to-date information.
The information about 4K Trail Run is based on information provided by the organizers or found on the official website of the event.
If you have noticed any mistake, please let us know at
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