| 07 Apr 2018 |
Woodside/Purisima Creek Crossover (50k|35k) |
Redwood City, California, United States |
| 7-8 Apr 2018 |
Gorge Waterfalls (50K|100k) |
Cascade Locks, Oregon, United States |
| 08 Apr 2018 |
Hollywood Half Marathon (13.1M) |
Los Angeles, California, United States |
| 08 Apr 2018 |
Peterson Ridge Rumble (20 Miler|40 Miler) |
Sisters, Oregon, United States |
| 14 Apr 2018 |
Lake Sonoma 50 (50 miles) |
Healdsburg, California, United States |
| 14 Apr 2018 |
Leona Divide 50/50 (50k|30k|50 Miler) |
Lake Hughes, California, United States |
| 14 Apr 2018 |
Rattler Trail Races (25k|10k) |
Colorado Springs, Colorado, United States |
| 14 Apr 2018 |
Whiskey Basin Trail Runs (31k|57k|88k) |
Prescott, Arizona, United States |
| 16 Apr 2018 |
Boston Marathon (Marathon) |
Boston, Massachusetts, United States |
| 20-21 Apr 2018 |
Zion Ultras (50 K|100 Mile|Half Marathon|100 K) |
Virgin, Utah, United States |
| 21 Apr 2018 |
Hyner Trail Challenge (25k|50k) |
Hyner, Pennsylvania, United States |
| 21 Apr 2018 |
Yakima Skyline Rim 50k (50k) |
Ellensburg, Washington, United States |
| 22 Apr 2018 |
Leatherman's Loop (10k) |
Ward Pound Ridge Reservation, New York, United States |
| 28 Apr 2018 |
Zane Grey (50 Miler) |
Pine, Arizona, United States |
| 28 Apr 2018 |
The Canyons Endurance Runs (50k|100k) |
Foresthill, California, United States |
| 28 Apr 2018 |
Tillamook Burn Trail Run (50k) |
Tillamook State Forest, Oregon, United States |
| 29 Apr 2018 |
Big Sur International Marathon (Marathon) |
Big Sur, California, United States |
| 04 May 2018 |
Salt Flats Endurance Runs (50 Miler|100 Miler) |
Wendover, Utah, United States |
| 05 May 2018 |
The Northface Endurance Challenge (Marathon|50K|50 Mile) |
Bear Mountain, New York, United States |
| 05 May 2018 |
Collegiate Peaks Trail Run (25 Miler|50 Miler) |
Buena Vista, Colorado, United States |