Marlborough close

Triathlon Calendar near Marlborough 2025-2026

Explore the top triathlons near Marlborough for 2025-2026! We've gathered 73 exciting races in the area. Check out our detailed list below to find your next local race.

December 2025
Dec
7
Sunday

Woo Jingle 5K

5 km
Dec
7
Sunday

Medfield Foundation Angel Run

5 km
Dec
13
Saturday

Mount Hood Nutcracker Challenge

Trail Run 2 mi 3 mi
Dec
14
Sunday

Somerville Jingle Bell Run

5 km
February 2026
Feb
7-8
Sa - Su

Tarctic Frozen Yeti

Trail Run 15 mi 30 hr
April 2026
Apr
4-5
Sa - Su

Run Across CT

Trail Run 100 km 200 km
Apr
11
Saturday

F.I.T. the Challenge OCR

Obstacle Run 3 mi
Apr
25
Saturday

TARC Spring Classic

Trail Run 10 km 13 mi 26 mi 50 km
Apr
26
Sunday

James Joyce Ramble 10 Km

10 km
May 2026
May
9
Saturday

Tarc Wapack and Back

Trail Run 21 mi 43 mi 50 mi
May
9
Saturday

Grafton Gazebo Road Race

5 km
May
17
Sunday

Harpoon 5-Miler

5 mi
June 2026
Jun
11
Thursday

Hollis Fast

5 km
Articles
Top 10 Marathons in the Netherlands — The Ultimate Dutch Marathon Bucket List: 10 Unmissable Races
The Beauty of the Easy Run — Why slowing down might be the smartest thing you do for your running
Mizuno Wave Rider 28: Elevating the Legacy of a Running Icon
Garmin Forerunner Review: Garmin Forerunner Series