| 15451 | 18 May 26 | 2026 EPIC5 Challenge . . | triathlon | Kauai, HI |
| 15452 | 20 May 26 | Nitemoves 2026 | 5K | Santa Barbara, CA |
| 15453 | 23 May 26 | 2026 Soldier Field 10 | 10K | Chicago, IL |
| 15454 | 23 May 26 | Muddy Dash | Austin | 5K | Austin, TX |
| 15455 | 23 May 26 | 2026 National Wine Day @ Three Fox 5k/1M | 1M/5K | Delaplane, VA |
| 15456 | 24 May 26 | Hibiscus Half Marathon, 15K and 5 Miler 2026 | 15K | Honolulu, HI |
| 15457 | 25 May 26 | Houston Holiday Series - Memorial Day Run, Half Marathon, 5K, 10K, Family and Kids' K | 5K | Houston, TX |
| 15458 | 25 May 26 | BIGFOOT CHALLENGE 5k/8k Memorial Day Run/Walk | ['5K'] | Dansville, MI |
| 15459 | 29 May 26 | 2026 Essentia Health Fargo Marathon | 5K/13.1/26.2 | Fargo, ND |
| 15460 | 30 May 26 | Silver Moon Race: Paso Robles | 10K/Ultra | Paso Robles, CA |
| 15461 | 30 May 26 | Summer Dash Series - Lemonade Dash Austin, 5K, 10K, Family and Kids' K | 5K | Round Rock, TX |
| 15462 | 30 May 26 | Muddy Dash | Oklahoma City | 5K | Oklahoma, OK |
| 15463 | 30 May 26 | 2026 Diamond Kid Triathlon | triathlon | Blue Diamond, NV |
| 15464 | 30 May 26 | 2026 OnondagaMan Half Iron | triathlon | Jamesville, NY |
| 15465 | 31 May 26 | North Shore Classic | 5K | Highland Park, IL |