| 07 Mar 2026 |
Seneca Creek Greenway Trail Marathon, 50K & Relay (50k) |
Gaithersburg, Maryland, United States |
| 07 Mar 2026 |
Rock/Creek Stump Jump (50K) |
Chattanooga, Tennessee, United States |
| 08 Mar 2026 |
Shamrocks & Shenanigans (1K|5K) |
Ann Arbor, Michigan, United States |
| 14 Mar 2026 |
Nine Trails 35 Mile Endurance Run (Half 17 Miler|35 Miler) |
Santa Barbara, California, United States |
| 14 Mar 2026 |
Singletrack Stampede (10K|22K) |
Calabasas, California, United States |
| 14 Mar 2026 |
Old West 50k, Marathon, and Half Marathon (Marathon|Half Marathon|50k) |
Julian, California, United States |
| 14 Mar 2026 |
Ruck a Chuck 50k (50K) |
Foresthill, California, United States |
| 14 Mar 2026 |
Mesquite Canyon Trail Runs (30K|1/2 Marathon|50K|50 Miler|8K) |
Waddell, Arizona, United States |
| 15 Mar 2026 |
Los Angeles Marathon (Marathon) |
Los Angeles, California, United States |
| 20-22 Mar 2026 |
Big Alta (28K|50K) |
Lucas Valley, California, United States |
| 21 Mar 2026 |
Ohio's Backyard Ultra (Last Person Standing - Day Course|Last Person Standing - Night Course) |
Lucasville, Ohio, United States |
| 21 Mar 2026 |
American Bottoms 100 (110 Mile|55 Mile) |
Columbia, Illinois, United States |
| 21 Mar 2026 |
VALENCIA Trail Race (Half Marathon|10K|50K) |
Valencia, California, United States |
| 21 Mar 2026 |
Blackbeard's Revenge (100 Miler) |
Corrolla, North Carolina, United States |
| 21 Mar 2026 |
Georgia's Death Race (68 miler) |
Blairsville, Georgia, United States |
| 21 Mar 2026 |
Northburn 100 (100 Miles) |
Pisa Moorings, Auckland, New Zealand |
| 21 Mar 2026 |
False Spring Trail Runs (10K|20K) |
Laporte, Indiana, United States |
| 21 Mar 2026 |
Chuckanut 50k (50k) |
Bellingham, Washington, United States |
| 22 Mar 2026 |
Mountain to Fountain (15K) |
Maricopa County, Arizona, United States |
| 27 Mar 2026 |
Badger Mountain Challenge (100 Miler|50 Miler) |
Richland, Washington, United States |