NUE Marathon (100K / 50 Miles) Series
| Race | Date | Location | Limit | Reg. Opens | ||
| 1. True Grit 50 | 11-Mar | Santa Clara, Utah | 1200 | OPEN | ||
| 2. Cohutta Big Frog 65 | 22 April | Ducktown, TN | 500 | 1/1/2023 | ||
| 3. Mohican MTB100K | 20 May | Loudonville, OH | 600 | OPEN | ||
| 4. Telluride 50 | 8-Jul | Telluride, CO | 300 | 12/1/2022 | ||
| 5. Carrabassett 100k | 15-July | Carrabassett Valley, ME | 400 | 2/1/2023 | ||
| 6. Wilderness 101k | 22-July | State College, PA | OPEN | |||
| 7. Pierre’s Hole 100k | 5 Aug | Alta, WY | 250 | 2/21/22 | ||
| 8. Shenandoah 100 | 2-Sept | Harrison, VA | 250 | 11/15/22 | ||
| 9. Marji Gesick 50 | 16-Sept | Ishpheming, MI | 1300 | SOLD OUT | ||
| 10 Ring of Fire 100K | 23 Sept | Bend OR | 200 | 12/15/2022 | ||
| 11. Grizzly 75K | 7-Oct | Big Bear Lake, CA | 500 | 1/1/2023 |
