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Triathlon Calendar near Chantilly 2025-2026

Explore the top triathlons near Chantilly for 2025-2026! We've gathered 120 exciting races in the area. Check out our detailed list below to find your next local race.

August 2025
Aug
24
Sunday

Sweet Run 10k

5 km 10 km
Aug
24
Sunday

South Lakes 10K

10 km
Aug
24
Sunday

Lakeside Loop 10k

10 km
Aug
30
Saturday

Kalero 5k

5 km
Aug
31
Sunday

Donut 5K

5 km
September 2025
Sep
1
Monday

Labor Day Burke Lake 10k

5 km 10 km
Sep
1
Monday

Labor Day 5K Run/Walk

5 km
Sep
6
Saturday

The Inferno 10k

Trail Run 10 km
Sep
6
Saturday

International Peace Marathon

13 mi 26 mi
Sep
6
Saturday

Arlington 9/11 Memorial 5K Race

Sep
7
Sunday

Mount Vernon Park 10k

10 km
Sep
7
Sunday

Reston Triathlon

Triathlon
Sep
9
Tuesday

Tuesday Night 5k

5 km
Sep
11
Thursday

Patriot Day 10k

10 km
Sep
13
Saturday

Tekau's Heart Memorial 5K Run

5 km
Sep
13
Saturday

Adventure Trail Run

Trail Run 30 km
Sep
14
Sunday

Valley View Hard Cider Challenge Half

Trail Run 5 km 10 km 13 mi
Sep
14
Sunday

DCHalf Marathon

5 km 13 mi
Sep
19
Friday

Oktoberfest 10k

5 km 10 km
Sep
20
Saturday

Lost Dog 10k

10 km
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