| 541 | 30 May 26 | 2026 Rock Hall Olympic Triathlon - SATURDAY | triathlon | Rock Hall, MD |
| 542 | 11 Jul 26 | 2026 Rock the Heat 5k/10k | 10K/5K | Rockville, MD |
| 543 | 14 Mar 26 | 2026 Rocket Blast-Off | 5K | Neenah, WI |
| 544 | 04 Oct 26 | 2026 Rockfest Half Marathon and 5K | 5K | Hampton, NH |
| 545 | 14 Mar 26 | 2026 Rocky Hill Triathlon, 5K & 10K | triathlon | Exeter, CA |
| 546 | 13 Jun 26 | 2026 Rocky Ridge 5k & 10k | 10K/5K | Charlottesville, VA |
| 547 | 22 Feb 26 | 2026 Rosaryville Ramble 5k/10k/Half | 10K/13.1/5K | Upper Marlboro, MD |
| 548 | 30 May 26 | 2026 Rose Festival Street Mile | 1 Mile | Portland, OR |
| 549 | 30 May 26 | 2026 Route 66 Triathlon Festival - Saturday Events | triathlon | Edmond, OK |
| 550 | 29 May 26 | 2026 RT 66 Multisport Festival Youth Aquathlon - Friday | triathlon | Edmond, OK |
| 551 | 18 Apr 26 | 2026 Rumpus in Bumpass Triathlon | triathlon | Bumpass, VA |
| 552 | 04 Apr 26 | 2026 Run and Done 3.1 (5K) | 5K | The Woodlands, TX |
| 553 | 07 Mar 26 | 2026 Run First Wine Later 3k/5k | 3K/5K | Lovettsville, VA |
| 554 | 08 Mar 26 | 2026 Run for Autism | 5K | Tempe, AZ |
| 555 | 18 Apr 26 | 2026 Run for the Trees: Happy Little 5k | 5K | Annapolis, MD |