| 7-8 Oct 2023 |
Midstate Massive Ultra Trail (30 Miler|100 Miler|50 Miler) |
New Ipswich, New Hampshire, United States |
| 07 Oct 2023 |
Tesla Hertz Run (100 Miler) |
Suffolk County, New York, United States |
| 07 Oct 2023 |
Canal Corridor 100 (100 Miler) |
Akron, Ohio, United States |
| 07 Oct 2023 |
Flagstaff Sky Peaks Mountain Runs (26K|50K|50 Miler|10 K) |
Coconino County, Arizona, United States |
| 07 Oct 2023 |
Harrisonburg Half Marathon (Half Marathon) |
Harrisonburg, Virginia, United States |
| 08 Oct 2023 |
Chicago Marathon (Marathon) |
Chicago, Illinois, United States |
| 08 Oct 2023 |
Steamtown Marathon (26.2 Miles) |
Forest City, Pennsylvania, United States |
| 08 Oct 2023 |
The Giants Foundation 5k presented by Quest (5k) |
East Rutherford, New Jersey, United States |
| 13-15 Oct 2023 |
Kodiak (21K|10K|100K|50K|100 Miler) |
Big Bear Lake, California, United States |
| 13 Oct 2023 |
Moab 240 Endurance Run (240) |
Moab, Utah, United States |
| 14 Oct 2023 |
Cloudsplitter 100 (100 Miler) |
Norton, Virginia, United States |
| 14 Oct 2023 |
Arkansas Marathon (Arkansas Marathon) |
Booneville, Arkansas, United States |
| 14 Oct 2023 |
Whiskey Row Marathon (Marathon|5K|10K|Half-Marathon) |
Prescott, Arizona, United States |
| 14 Oct 2023 |
Elk-Kings 25k/50k (25K|50K) |
Tillamook, Oregon, United States |
| 14 Oct 2023 |
No Name 5030 (50K) |
Agoura, California, United States |
| 14 Oct 2023 |
Cave Creek Thriller (50K|11K|24K|5K) |
Cave Creek, Arizona, United States |
| 14 Oct 2023 |
Autumn 100 (100 Miles) |
Streatley, England, United Kingdom |
| 15 Oct 2023 |
Toronto Waterfront Marathon (Marathon|5K|Half Marathon) |
Old Toronto, Ontario, Canada |
| 15 Oct 2023 |
Jet Blue Long Beach Marathon (Marathon) |
Long Beach, California, United States |
| 20 Oct 2023 |
Mines of Spain 100 (100 Miler|100K) |
Dubuque, Iowa, United States |