| 15931 | 06 Sep 25 | 2025 Brett-Robinson Alabama Coastal Triathlon | triathlon | Gulf Shores, AL |
| 15932 | 27 Sep 25 | 2025 Brandy Station 5k/10k | 10K/5K | Orange, VA |
| 15933 | 18 Oct 25 | 2025 Boyle Heights 5K Run | 5K | Los Angeles, CA |
| 15934 | 26 Dec 25 | 2025 Boxing Day 5k/10k | 10K/5K | Annandale, VA |
| 15935 | 25 Oct 25 | 2025 Book It for Books 5k/10k/1miler | 10K/1M/5K | Springfield, VA |
| 15936 | 12 Oct 25 | 2025 Bolivar Live Triathlon | triathlon | Port Bolivar, TX |
| 15937 | 28 Sep 25 | 2025 Boilerman Triathlon | triathlon | Monticello, IN |
| 15938 | 12 Oct 25 | 2025 Block Island Half Marathon | Half Marathon | Block Island, RI |
| 15939 | 06 Sep 25 | 2025 Blake's Tinman Triathlon | triathlon | Reedsburg, WI |
| 15940 | 06 Sep 25 | 2025 Blackhawk YMCA Triathlon | triathlon | Waterloo, IA |
| 15941 | 28 Nov 25 | 2025 Black Friday 5k/10k | 10K/5K | Herndon, VA |
| 15942 | 27 Sep 25 | 2025 Black Canyon Triathlon | triathlon | Montrose, CO |
| 15943 | 14 Sep 25 | 2025 Bishop Memorial 5k/10k | 10K/5K | Alexandria, VA |
| 15944 | 27 Sep 25 | 2025 Big Hurt Multisport Adventure | triathlon | Port Angeles, WA |
| 15945 | 27 Sep 25 | 2025 Beware of Barracuda Triathlon | triathlon | Hazleton, PA |