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Running Calendar near Swansea 2026-2027

Monthly updates for Swansea

Get new running races (and updates) in your inbox every month.

Explore the top running races near Swansea for 2026-2027! We've gathered 93 exciting races in the area. Check out our detailed list below to find your next local race.

Half Marathons Marathons Trail Runs Triathlons
March 2026
Mar
14
Sa

Creve Coeur St. Paddy's Half Marathon

5 km 10 km 13 mi
Mar
14
Sa

St. Patrick's Day Parade Run

5 km
Mar
14
Sa

Waterloo Citizens for a Pool St. Paddy's Day 5K

5 km
Mar
14
Sa

WashU Olin Veterans Association Run

5 km
Mar
14
Sa

Lucky Leprechaun 5K - Belleville

5 km
Mar
15
Su

Florissant St. Patrick's Day 5K Run

5 km
Mar
21
Sa

American Bottoms 100

55 mi 110 mi
Mar
22
Su

Chain of Rocks 6K

6 km
Mar
28
Sa

Double Chubb 50K

Trail Run 8 mi 25 km 50 km
Mar
28
Sa

Schon Park 9 Endurance Run

Backyard Ultra
Mar
28
Sa

Kit Crawl 10K

10 km
Mar
28
Sa

Glendale, MO Firehouse Run

5 km 10 km
April 2026
Apr
4
Sa

GO! St. Louis Marathon

5 km
Apr
11
Sa

Greater St. Louis Marathon

5 km 10 km 13 mi 26 mi
Apr
11
Sa

Walk with a Friend

5 km 10 km
Apr
11
Sa

Students on the GO!

10 km 13 mi
Apr
12
Su

Brain Bolt 5K - Maryland Heights

5 km
Apr
18
Sa

DoNot Stop Half Marathon - St. Louis

3 mi 6 mi 13 mi
Apr
18
Sa

Green Park Viking Dash

Trail Run 5 km
Apr
18
Sa

Eckert's Belleville Farm Wine Run 5k

5 km