Stony Brook close

Triathlon Calendar near Stony Brook 2025-2026

Explore the top triathlons near Stony Brook for 2025-2026! We've gathered 138 exciting races in the area. Check out our detailed list below to find your next local race.

December 2025
Dec
6
Saturday

Seaford Wellness Hot Chocolate 5K Run/Walk

5 km
Dec
7
Sunday

Christopher Martin's Christmas Run

5 km
Dec
7
Sunday

Santa's Toy Trot 5K Run/Walk

5 km
Dec
13
Saturday

Frosty Forest 5K

Trail Run 5 km
Dec
14
Sunday

Jingle All The Way

5 km
March 2026
Mar
1
Sunday

ShamRock & Roll 5K

5 km
Mar
21
Saturday

Kings Park 15K Run

15 km
Mar
28
Saturday

Savin Rock Marathon

13 mi 26 mi
May 2026
May
9
Saturday

Riverside Run 3 Mile

3 mi
May
9
Saturday

Glen Cove YMCA 5K Run/Walk

5 km
May
17
Sunday

BoFish Triathlon

Triathlon
May
17
Sunday

SOUL RYEDERS Half Marathon

5 km 13 mi
May
23
Saturday

Run for Briggs 5K

5 km
June 2026
Jun
21
Sunday

Massapequa Firecracker 5K Run/Walk

5 km
Jun
21
Sunday

NSRF Presents The Rainbow Run 5K

5 km
July 2026
Jul
4
Saturday

Independence Day 4 Mile Run/Walk

4 mi
Jul
12
Sunday

Jamesport Triathlon

Triathlon
Jul
18
Saturday

Joe Koziarz 5K Run/Walk

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