NUE Marathon (100K / 50 Miles) Series
| Race | Date | Location | Limit | Reg. Opens | ||
| 1. True Grit 50 | 16-Mar | Santa Clara, Utah | 1200 | OPEN | ||
| 2. Cohutta Big Frog 65 | 20 April | Ducktown, TN | 500 | 1/1/2024 | ||
| 3. Gigantes Small | 4 May | Velencia, ESP | 350 | 1/1/2024 | ||
| 4.Mohican MTB100K | 18 May | Loudonville, OH | 600 | OPEN | ||
| 5. Carrabassett 100k | 13-July | Carrabassett Valley, ME | 400 | 2/1/2024 | ||
| 6. Wilderness 101k | 27-July | State College, PA | OPEN | |||
| 7. Pierre’s Hole 100k | 3 Aug | Alta, WY | 250 | 2/21/24 | ||
| 8. Shenandoah 100 | 31-Aug | Harrison, VA | 250 | 11/15/24 | ||
| 9. Marji Gesick 50 | 21-Sept | Ishpheming, MI | 1300 | Open | ||
| 10 Ring of Fire 100K | 28 Sept | Bend OR | Open | |||
| 11. Grizzly 75K | 5-Oct | Big Bear Lake, CA | 500 | 1/1/2024 |
