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Triathlon Calendar near Riverhead 2025-2026

Explore the top triathlons near Riverhead for 2025-2026! We've gathered 52 exciting races in the area. Check out our detailed list below to find your next local race.

October 2025
Oct
10
Friday

Tesla Hertz Run

Trail Run 10 mi 50 km ... 100 mi 150 mi
Oct
18
Saturday

5K Run for the Ridley

5 km
Oct
18
Saturday

Terryville Fire Department 5K Run/Walk

5 km
Oct
19
Sunday

Bimblers Bluff 50k

Trail Run 50 km
Oct
25
Saturday

SBFD Engine Company Monster Dash 5K Run/Walk

5 km
November 2025
Nov
1
Saturday

Southold Athletic Association 5K & Fun Run

5 km
Nov
3
Monday

Hudsy 5K Run/Walk

5 km
Nov
27
Thursday

Branford Thanksgiving 5K

5 km
Nov
27
Thursday

Shoreline Turkey Trot 5K

5 km
Nov
27
Thursday

EMO Turkey Trot 5K

5 km
December 2025
Dec
7
Sunday

Santa's Toy Trot 5K Run/Walk

5 km
March 2026
Mar
28
Saturday

Savin Rock Marathon

13 mi 26 mi
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