| 496 | | 14 Jun 24 | 2024 Jenny Lee Tri Cup - NTDR Sprint (Friday) | triathlon | Beaver Falls, PA |
| 497 | | 19 May 24 | 2024 Jerseyman Triathlon . . | triathlon | Lebanon, NJ |
| 498 | | 18 May 24 | 2024 Julie Hughes Triathlon | triathlon | Sitka, AK |
| 499 | | 19 Jun 24 | 2024 Juneteeth Menare Foundation 6k & 12k | Triathlon/6k/12k | Germantown, MD |
| 500 | | 23 Jun 24 | 2024 Junior Development Triathlon Camp . . | triathlon | Gettysburg, PA |
| 501 | | 03 Aug 24 | 2024 K-Town On The River Triathlon ?? . . | triathlon | Knoxville, TN |
| 502 | | 19 May 24 | 2024 Kansas City Triathlon . . | triathlon | Kansas, MO |
| 503 | | 23 Jun 24 | 2024 Kathy Mellor 'Mum'orial Swim/Run Classic . . | triathlon | Williamstown, NJ |
| 504 | | 01 Sep 24 | 2024 Katy Triathlon ?? . . | triathlon | Katy, TX |
| 505 | | 10 Jun 24 | 2024 KC3 Tri Club Clinic . . | triathlon | Lake Lotawana, MO |
| 506 | | 05 May 24 | 2024 Keep Texas Wild Triathlon . . | triathlon | Mathis, TX |
| 507 | | 27 Oct 24 | 2024 Kegs and Eggs Halloween 5k - October 27 | 5K | Manheim, PA |
| 508 | | 29 Sep 24 | 2024 Kenai River Marathon | 5K | Kenai, AK |
| 509 | | 10 Aug 24 | 2024 Kenzie Rose Youth Triathlon | triathlon | Millersville, MD |
| 510 | | 07 Dec 24 | 2024 Keswick 5k | 5K | Keswick, VA |
