| 06 Jan 2018 |
La Cuesta Ranch Trail Run (14 Miler|28 Miler) |
San Luis Obispo, California, United States |
| 06 Jan 2018 |
Bandera Endurance Run (50k|100k) |
Bandera, Texas, United States |
| 13 Jan 2018 |
HURT 100 (100 Miler) |
Honolulu, Hawaii, United States |
| 13 Jan 2018 |
Southern California Half Marathon & 5k (5k) |
Irvine, California, United States |
| 20 Jan 2018 |
Coldwater Rumble (100 Miler|52 K) |
Goodyear, Arizona, United States |
| 20 Jan 2018 |
Avalon 50k/50m (50K|50 Miler) |
Avalon, California, United States |
| 21 Jan 2018 |
Xterra Boney Mountain (21k|6k) |
Newbury Park, California, United States |
| 27 Jan 2018 |
AZT Oracle Rumble (Half Marathon|50 K) |
Oracle, Arizona, United States |
| 03 Feb 2018 |
Orcas Island 50k (50 K) |
Orcas Island, Washington, United States |
| 03 Feb 2018 |
Ordnance 100K (100 KM) |
Salinas, California, United States |
| 03 Feb 2018 |
Sean O'Brien (100k|50 miler|Marathon|50k) |
Calabasas, California, United States |
| 04 Feb 2018 |
Redondo Beach Superbowl 10k/5k (5k|10k) |
Redondo Beach, California, United States |
| 09 Feb 2018 |
Orcas Island 100 (100 Mile) |
Orcas Island, Washington, United States |
| 10 Feb 2018 |
Tarawera Ultramarathon (87k|102k|62k) |
Rotorua, Bay of Plenty, New Zealand |
| 10 Feb 2018 |
Mill Stone 50K (50 K) |
Fort Mill, South Carolina, United States |
| 17 Feb 2018 |
Moab's Red Hot 50+ (55k|33k) |
Moab, Utah, United States |
| 17 Feb 2018 |
Black Canyon Ultras (100k|60k) |
Spring Valley, Arizona, United States |
| 17-18 Feb 2018 |
FOURmidable (50K|35K) |
Auburn, California, United States |
| 23-24 Feb 2018 |
TransGranCanaria (125K|42K|82K) |
Agaeta, Las Palmas, Spain |
| 24 Feb 2018 |
Salmon Falls 50k (50k) |
Coloma, California, United States |
| 24 Feb 2018 |
Mt. Mitchell Challenge & Black Mountain Marathon (Mt. Mitchell Challenge|Black Mountain Marathon) |
Black Mountain, North Carolina, United States |
| 03 Mar 2018 |
Singletrack Stampede (22k|42k) |
Calabasas, California, United States |
| 03 Mar 2018 |
Griffith Park Trail Marathon (Half-Marathon|50k|Marathon) |
Los Angeles, California, United States |
| 03 Mar 2018 - 07 Mar 2020 |
Seneca Creek Greenway Trail Marathon, 50K & Relay (50k|Seneca Trail Marathon. ) |
Gaithersburg, Maryland, United States |
| 03 Mar 2018 |
Way Too Cool (50k) |
Cool, California, United States |
| 17 Mar 2018 |
Mesquite Canyon Trail Runs (30 K|Half Marathon|50 K|50 Miler|8 K) |
Waddell, Arizona, United States |
| 17 Mar 2018 |
Chuckanut 50k (50k) |
Bellingham, Washington, United States |
| 17 Mar 2018 |
Ruck a Chuck 50k (50k) |
Foresthill, California, United States |
| 18 Mar 2018 |
Los Angeles Marathon (Marathon) |
Los Angeles, California, United States |
| 23 Mar 2018 |
GORTEX Grand Traverse (Grand Traverse) |
Crested Butte, Colorado, United States |
| 24 Mar 2018 |
Great Race of Agoura Hills (Half Marathon|5k) |
Agoura Hills, California, United States |
| 24 Mar 2018 |
Crown King Scramble (50 K) |
Phoenix, Arizona, United States |
| 24 Mar 2018 |
Nine Trails 35 Mile Endurance Run (35 Miler) |
Santa Barbara, California, United States |
| 25 Mar 2018 |
White Mountains 100 (100 Miler) |
Fairbanks, Alaska, United States |
| 25 Mar 2018 |
Behind the Rocks (30k|50k|50 Miler) |
Moab, Utah, United States |
| 30 Mar 2018 |
Badger Mountain Challenge (50 mile|100 mile) |
Richland, Washington, United States |
| 31 Mar 2018 |
Georgia's Death Race (68 miler) |
Blairsville, Georgia, United States |
| 7-8 Apr 2018 |
Gorge Waterfalls (50K|100k) |
Cascade Locks, Oregon, United States |
| 07 Apr 2018 |
Woodside/Purisima Creek Crossover (50k|35k) |
Redwood City, California, United States |
| 07 Apr 2018 |
Brazos Bend (25k|50 miler|50k) |
Needville, Texas, United States |
| 07 Apr 2018 |
Yamacraw (20K|50K) |
Stearns, Kentucky, United States |
| 07 Apr 2018 |
American River (50 miler) |
Folsom, California, 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 |
The Canyons Endurance Runs (50k|100k) |
Foresthill, California, United States |
| 28 Apr 2018 |
Tillamook Burn Trail Run (50k) |
Tillamook State Forest, Oregon, United States |
| 28 Apr 2018 |
Zane Grey (50 Miler) |
Pine, Arizona, 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 |
Miwok 100k (100k) |
Stinson Beach, California, United States |
| 05 May 2018 |
Collegiate Peaks Trail Run (25 Miler|50 Miler) |
Buena Vista, Colorado, United States |
| 05 May 2018 |
The Northface Endurance Challenge (Marathon|50K|50 Mile) |
Bear Mountain, New York, United States |
| 06 May 2018 |
Verdugo Mountains 10k (10k) |
Glendale, California, United States |
| 06 May 2018 |
Volkswagen Prague Marathon (Marathon) |
Prague, PR, Czechia |
| 12 May 2018 |
Smith Rock Ascent (15m|50k|4m) |
Terrebonne, Oregon, United States |
| 12 May 2018 |
Yosemite Half Marathon (Half Marathon) |
Yosemite National Park, California, United States |
| 12 May 2018 |
Ice Age Trail Endurance Runs (50 Miler|Half Marathon|50k) |
La Grange, Wisconsin, United States |
| 12 May 2018 |
Quicksilver (100k|50k) |
San Jose, California, United States |
| 12 May 2018 |
Quad Rock 50 (25 Miler|50 Miler) |
Fort Collins, Colorado, United States |
| 12 May 2018 |
Lost Lake (25k|50k) |
Bellingham, Washington, United States |
| 18 May 2018 |
Cruel Jewel 100 (100 Miler) |
Blairesville, Georgia, United States |
| 19 May 2018 |
Jemez Mountain (15 Miler|50 Miler|50K) |
Los Alamos, New Mexico, United States |
| 19 May 2018 |
Quest for the Crest Trail Races (50 K) |
Burnsville, North Carolina, United States |
| 19 May 2018 |
Sun Mountain 100K & 50K (50K) |
Winthrop, Washington, United States |
| 19 May 2018 |
PCT 50 (50 Miler) |
Cleveland National Forest, California, United States |
| 19 May 2018 |
Ultra-Trail Austrailia (50k|100k) |
Katoomba, New South Wales, Australia |
| 20 May 2018 |
Ohlone (50K) |
Fremont, California, United States |
| 26-28 May 2018 |
Trail Factor (Half Marathon|50k) |
Portland, Oregon, United States |
| 27 May 2018 |
Mountains 2 Beach (Marathon|Half-Marathon) |
Ojai, California, United States |
| 1-2 Jun 2018 |
Bryce Canyon Ultras (100 Miler|50k|50 Miler) |
Bryce Canyon, Utah, United States |
| 02 Jun 2018 |
Worlds End Ultramarathon (50k|100k) |
Forksville, Pennsylvania, United States |
| 02 Jun 2018 |
Bishop High Sierra Ultras (50 K|50 Mile|100 K) |
Bishop, California, United States |
| 02 Jun 2018 |
Monrovia Canyon Trail Runs (Half Marathon|30k) |
Monrovia, California, United States |
| 2-3 Jun 2018 |
Golden Gate Dirty 30 (12 Miler|50k) |
Black Hawk, Colorado, United States |
| 03 Jun 2018 |
State Street Mile (Mile) |
Santa Barbara, California, United States |
| 03 Jun 2018 |
Old Dominion 100 Mile (100 Miles) |
Fort Valley, Virginia, United States |
| 08 Jun 2018 |
San Diego 100 (100 Miler) |
Lake Cuyamaca, California, United States |
| 10 Jun 2018 |
Valley Crest (Half Marathon) |
Tarzana, California, United States |
| 15-17 Jun 2018 |
Broken Arrow SkyRace (52 km|26 km|Kids Race|VK|10km) |
Olympic Valley, California, United States |
| 15-16 Jun 2018 |
Bighorn Trail Run (100 Miler|32 Miler|52 Miler) |
Sheridan, Wyoming, United States |
| 16 Jun 2018 |
Mohican 100 (100M) |
Loudonville, Ohio, United States |
| 16 Jun 2018 |
Mary's Peak Trail Run (50K|50 Miler|25K) |
Blodgett, Oregon, United States |
| 16 Jun 2018 |
Grandma's Marathon (Marathon) |
Two Harbors, Minnesota, United States |
| 16 Jun 2018 |
Glacier Half Marathon (Half Marathon) |
Browning, Montana, United States |
| 16 Jun 2018 |
Old Gabe (30k|50k) |
Bozeman, Montana, United States |
| 16 Jun 2018 |
Vegan Power 50K (25K|50K) |
Pittsfield, Massachusetts, United States |
| 16 Jun 2018 |
River of No Return (50k) |
Challis City Park, Idaho, United States |
| 22 Jun 2018 |
The North Face Lavaredo Ultra Trail (120K) |
Cortina D'ampezzo, Belluno, Italy |
| 22-23 Jun 2018 |
Black Hills 100 (100 Miler|50 K|50 Miler) |
Sturgis, South Dakota, United States |
| 23 Jun 2018 |
Sinks Canyon Rough & Tumble Trail Runs (50 km|18 km) |
Lander, Wyoming, United States |
| 23 Jun 2018 |
Western States (100-Mile Endurance Run) |
Squaw Valley, California, United States |