| 12511 | 21 Jun 26 | 2026 Bozeman Triathlon | triathlon | Bozeman, MT |
| 12512 | 28 Jun 26 | 2026 Boulder Sunrise Triathlon | triathlon | Boulder, CO |
| 12513 | 12 Jul 26 | 2026 Boulder Peak Triathlon | triathlon | Boulder, CO |
| 12514 | 27 Jun 26 | 2026 Bottomless Triathlon | triathlon | Roswell, NM |
| 12515 | 23 Aug 26 | 2026 Boston Triathlon | triathlon | Boston, MA |
| 12516 | 25 Apr 26 | 2026 Booking It Through the Bluff Triathlon & 10K | triathlon | Hokes Bluff, AL |
| 12517 | 26 Apr 26 | 2026 Bluemont Station Brewery & Winery 5k | 5K | Bluemont, VA |
| 12518 | 21 Feb 26 | 2026 Blizzard Blast 5k/10k | 10K/5K | Williamsburg, VA |
| 12519 | 25 Jul 26 | 2026 Black Squirrel Scurry Triathlon | triathlon | Merrill, WI |
| 12520 | 27 Nov 26 | 2026 Black Friday 5k/10k | 10K/5K | Herndon, VA |
| 12521 | 20 Jun 26 | 2026 Black Butte Triathlon | triathlon | Corning, CA |
| 12522 | 12 Apr 26 | 2026 Bill Bone OLYMPIC Triathlon | triathlon | West Palm Beach, FL |
| 12523 | 07 Jun 26 | 2026 Best in the West Triathlon Festival - Sunday Events | triathlon | Foster, OR |
| 12524 | 06 Jun 26 | 2026 Best in the West Triathlon Festival - Saturday Events | triathlon | Foster, OR |
| 12525 | 18 Apr 26 | 2026 BENGAL TRIATHLON (+Du & 5K) | 5K | Pocatello, ID |