2019 NUE Marathon (100K / 50 Miles) Series
| Race | Date | Location | Limit | Reg. Opens | ||
| 1. True Grit 50 | 13-14-Mar | Santa Clara, Utah | 700 | Closed | ||
| 2. Cohutta Big Frog 65 | 3-OCT | Ducktown, TN | 500 | REGISTER HERE | ||
| 3. Mohican MTB100K | 30-May | Loudonville, OH | 600 | Closed | ||
| 4. Carrabassett 100k | Cancelled | Carrabassett Valley, ME | 600 | Closed | ||
| 5. Wilderness 101k | Cancelled | State College, PA | 400 | Closed | ||
| 6. Pierre’s Hole 100k | Cancelled | Alta, WY | 625 | Closed | ||
| 7. Big Sky Biggie | Cancelled | Big Sky, MT | 350 | Closed | ||
| 8. Shenandoah | 6-Sept | Harrison, VA | 650 | REGISTER HERE | ||
| 9. Fool’s Gold | 12-Sept | Dahlonega. GA | 500 | REGISTER HERE | ||
| 10. Marji Gesick 50 | Cancelled | Ishpheming, MI | 666 | Closed | ||
| 11. Grizzly 75K | 26-Sep | Big Bear Lake, CA | 500 | REGISTER HERE |
