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Triathlon Calendar near Riverhead 2025-2026

Explore the top triathlons near Riverhead for 2025-2026! We've gathered 47 exciting races in the area. Check out our detailed list below to find your next local race.

December 2025
Dec
14
Sunday

Jingle Bell Run - Madison

5 km
March 2026
Mar
28
Saturday

Savin Rock Marathon

13 mi 26 mi
May 2026
May
23
Saturday

Run for Briggs 5K

5 km
July 2026
Jul
12
Sunday

Jamesport Triathlon

Triathlon
Jul
18
Saturday

Joe Koziarz 5K Run/Walk

5 km
August 2026
Aug
2
Sunday

Race of Hope Southampton

5 km
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