| 3856 | 17 May 26 | Ironman 70.3 Chattanooga | half triathlon | Chattanooga, TN |
| 3857 | 17 May 26 | Nashville Women's Triathlon | Sprint/supersprint triathlon | Nashville, TN |
| 3858 | 17 May 26 | Great World Peace 5K | 5K | Bangor, ME |
| 3859 | 17 May 26 | Sugarloaf Marathon & 15K | 15K/26.2M | Carrabassett Valley, ME |
| 3860 | 17 May 26 | Boston Bulldogs Run for Recovery | 5K | Boston, MA |
| 3861 | 17 May 26 | Cranky Crab Half Marathon | 5K/13.1M | Seekonk, MA |
| 3862 | 17 May 26 | Evan's Run | 5K | Norwell, MA |
| 3863 | 17 May 26 | Harpoon 5-Miler | 5M | Boston, MA |
| 3864 | 17 May 26 | Healthy Kids Running Series - Jamaica Plain | kids run | Jamaica Plain, MA |
| 3865 | 17 May 26 | Horseneck Half and 3.5M | 3.5M/13.1M | Westport, MA |
| 3866 | 17 May 26 | New England Season Opener Triathlon & Duathlon | Sprint Duathlon/Sprint Triathlon/Sprint Triathlon Relay/sprint duathlon relay | Hopkinton, MA |
| 3867 | 17 May 26 | Newton South Booster Club Lions 5K | 5K | Newton, MA |
| 3868 | 17 May 26 | Outrun Hunger | 1M/5K | Springfield, MA |
| 3869 | 17 May 26 | Spring Shuffle - Run, Walk, Roll | 5K | Longmeadow, MA |
| 3870 | 17 May 26 | Steel Rail Race | 8K/13.1M/26.2M | Pittsfield, MA |