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Triathlon Calendar near Stony Brook 2025-2026

Monthly updates for Stony Brook

Get new running races (and updates) in your inbox every month.

Explore the top triathlons near Stony Brook for 2025-2026! We've gathered 11 exciting races in the area. Check out our detailed list below to find your next local race.

April 2026
Apr
11
Sa

Cedar Creek Spring Duathlon

Duathlon
Apr
19
Su

Mini MightyMan Triathlon

Triathlon
May 2026
May
10
Su

Mighty Mother's Day Duathlon

Duathlon
May
17
Su

BoFish Triathlon

Triathlon
May
31
Su

Women's Whisper Triathlon

Triathlon
July 2026
Jul
12
Su

Jamesport Triathlon

Triathlon
August 2026
Aug
2
Su

Smith Point Sprint Triathlon

Triathlon
Aug
22-23
Sa - Su

Tobay Triathlon

Triathlon
September 2026
Sep
19-20
Sa - Su

TOUGHMAN Westchester Triathlon

Triathlon
Sep
26
Sa

IRONMAN 70.3 New York/Jones Beach

Triathlon
October 2026
Oct
10
Sa

Cedar Creek Fall Duathlon

Duathlon