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Triathlon Calendar near River Forest 2025-2026

Explore the top triathlons near River Forest for 2025-2026! We've gathered 70 exciting races in the area. Check out our detailed list below to find your next local race.

September 2025
Sep
28
Sunday

Lester Fun Run

5 km
Sep
28
Sunday

Chicago Half Marathon

5 km 13 mi
Sep
28
Sunday

Plainfield Harvest Run

October 2025
Oct
4
Saturday

Scarecrow Scramble

5 km
Oct
4
Saturday

Long Grove's Prairie State Half Marathon

5 km 10 km 13 mi
Oct
4
Saturday

Stone & Steel Spooky 5k

5 km
Oct
5
Sunday

Cheesy Pretzel 5K

5 km
Oct
5
Sunday

Bronzeville 5K

5 km
Oct
5
Sunday

Chicago 5k

5 km
Oct
11
Saturday

Des Plaines River Trail Races

Trail Run 13 mi 26 mi 50 km 50 mi
Oct
12
Sunday

Chicago Marathon

Oct
18
Saturday

Spooky Sprint - Chicago

5 km 10 km 13 mi
Oct
18
Saturday

Rosehill Cemetery 'Crypt' 5K

5 km
Oct
18
Saturday

Country Sole Half Marathon

5 km 10 km 13 mi
Oct
19
Sunday

Run with the Nuns

5 km
Oct
19
Sunday

Naperville Half Marathon

5 km 10 km 13 mi
Oct
25
Saturday

Fancy Nonsense 25K/50K

Trail Run 25 km 50 km
Oct
26
Sunday

Haunted Halloween Half Marathon

5 km 13 mi
Oct
26
Sunday

Endeavor Health Fraidycat 8k

5 km 8 km
November 2025
Nov
15
Saturday

The Forge Trail Run Festival

Trail Run 10 km 20 km 30 km 60 km
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