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Half Marathon Calendar near Centennial 2025-2026

Explore the top half marathons near Centennial for 2025-2026! We've gathered 36 exciting races in the area. Check out our detailed list below to find your next local race.

July 2025
Jul
5
Saturday

The Best Races - Centennial

5 km 10 km 13 mi
Jul
12
Saturday

All-Out Dog Days

5 km 10 km 13 mi
Jul
19
Saturday

Summer Splash Prairie Dog Half

5 km 10 km 13 mi
August 2025
Aug
2
Saturday

All-Out Runapalooza

5 km 10 km 13 mi
Aug
2
Saturday

The Best Races - Centennial

5 km 10 km 13 mi
Aug
3
Sunday

Bound for Boston Marathon - Denver

13 mi 26 mi
Aug
23
Saturday

Westminster Night Trail

Trail Run 5 km 10 km ... 35 km 50 km
Aug
23
Saturday

Staunton Rocks

Trail Run 13 mi 26 mi
Aug
30
Saturday

The Best Races - Centennial

5 km 10 km 13 mi
September 2025
Sep
1
Monday

Labor Day Half Marathon

5 km 10 km 13 mi
Sep
13
Saturday

All-Out Fall Fest

5 km 10 km 13 mi
Sep
13
Saturday

The Best Races - Centennial

5 km 10 km 13 mi
Sep
14
Sunday

Spooky Sprint - Denver

5 km 10 km 13 mi
Sep
14
Sunday

Nun Run

5 km 13 mi
Sep
27
Saturday

Pioneer Prairie Dog Half

5 km 10 km 13 mi
Sep
27
Saturday

The Best Races - Centennial

5 km 10 km 13 mi
October 2025
Oct
4-5
Sa - Su

The Bear Chase

Trail Run 5 km 10 km ... 50 mi 100 km
Oct
4
Saturday

Castle Rock Trail Festival

Trail Run 5 km 10 km 13 mi 50 km
Oct
4
Saturday

The Best Races - Centennial

5 km 10 km 13 mi
Oct
12
Sunday

Westy Half

5 km 13 mi
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