| 01 Jan 2023 |
Resolution Run 5k (5k) |
Missoula, Montana, United States |
| 07 Jan 2023 |
Avalon 50k/50m (50K|50 Miler) |
Avalon, California, United States |
| 7-28 Jan 2023 |
Sean O'Brien 50k/26.2/30k (20K|Marathon|30K|50K) |
Malibu, California, United States |
| 07 Jan 2023 |
Griffith Park Resolution Run (5K|12K|Half Marathon) |
Los Angeles, California, United States |
| 08 Jan 2023 |
Koumaria Marathon (38km) |
Patras, West Greece, Greece |
| 11 Jan 2023 |
Hootenanny 50k (50k & Relay) |
Lolo, Montana, United States |
| 14 Jan 2023 |
Frozen H3 (100 Miler) |
Charleston, South Carolina, United States |
| 14 Jan 2023 |
Coldwater Rumble (52K|100 Miler) |
Goodyear, Arizona, United States |
| 14 Jan 2023 |
HURT 100 (HURT 100) |
Honolulu, Hawaii, United States |
| 14 Jan 2023 |
Long Haul 100 (100 Miler) |
Ehren, Florida, United States |
| 15 Jan 2023 |
Carlsbad Full & Half Marathon (Half Marathon) |
Carlsbad, California, United States |
| 22 Jan 2023 |
Calico Trail Run (50K) |
San Bernardino County, California, United States |
| 27 Jan 2023 |
Arc of Attrition (100 Miles) |
Coverack, England, United Kingdom |
| 28 Jan 2023 |
La Cuesta Ranch Trail Run (50K|25K) |
San Luis Obispo, California, United States |
| 28 Jan 2023 |
Beast of Burden (Winter) (100 Miler) |
Lockport, New York, United States |
| 28 Jan 2023 |
Sean O'Brien 100K/50M (100K|50 Miler) |
Calabasas, California, United States |
| 28 Jan 2023 |
Ordnance 100K (100 KM) |
Salinas, California, United States |
| 28 Jan 2023 |
Orcas Island 50k (50K) |
Orcas Island, Washington, United States |
| 28 Jan 2023 |
AZT Oracle Rumble (1/2 Marathon|50K) |
Oracle, Arizona, United States |
| 30 Jan 2023 |
Arrowhead 135 (135M Veteran) |
International Falls, Minnesota, United States |
| 03 Feb 2023 |
Orcas Island 100 (100 Miler) |
Orcas Island, Washington, United States |
| 04 Feb 2023 |
Castlewood Cup (15K - Fair Weather|15k - Fair Weather - Course Monitors|Plan B - Course Monitors|"Plan B") |
Ballwin, Missouri, United States |
| 04 Feb 2023 |
Castlewood Cup (Fair-Weather Conditions Route|Ice/Snow Conditions Route) |
Ballwin, Missouri, United States |
| 04 Feb 2023 |
Mill Stone 50K (50K) |
Fort Mill, South Carolina, United States |
| 05 Feb 2023 |
Surf City USA (Half Marathon|Marathon) |
Huntington Beach, California, United States |
| 11 Feb 2023 |
Grandmaster Ultras (100 Miler) |
Littlefield, Arizona, United States |
| 11 Feb 2023 |
Tarawera Ultramarathon (102k|21k|50k|100 Miles) |
Rotorua, Bay of Plenty, New Zealand |
| 11 Feb 2023 |
Outlaw 100 Oklahoma (50 Miler) |
Latimer County, Oklahoma, United States |
| 11 Feb 2023 |
Xterra Boney Mountain (21k|6k) |
Newbury Park, California, United States |
| 12 Feb 2023 |
Running Up for Air Mount Sentinel (RUFA) |
Missoula, Montana, United States |
| 12 Feb 2023 |
Mercedes-Benz Marathon (Marathon|Half Marathon) |
Birmingham, Alabama, United States |
| 12 Feb 2023 |
Redondo Beach Superbowl 10k/5k (10k|5k) |
Redondo Beach, California, United States |
| 17 Feb 2023 |
FOURmidable (50K|35.5K) |
Auburn, California, United States |
| 18 Feb 2023 |
The Ranch 50k (50k|1/2 Marathon) |
Escondido, California, United States |
| 18 Feb 2023 |
Susitna 100 (100 Miles) |
Big Lake, Alaska, United States |
| 18 Feb 2023 |
Black Canyon Ultras (100K|60K) |
Spring Valley, Arizona, United States |
| 18 Feb 2023 |
Moab's Red Hot 50+ (55K|33K) |
Moab, Utah, United States |
| 18 Feb 2023 |
Placerita Canyon Trail Runs (10k|Half Marathon|50k|30k) |
Santa Clarita, California, United States |
| 24 Feb 2023 |
Lake Ouachita Vista Trail (100 Miler) |
Joplin, Arkansas, United States |
| 24-25 Feb 2023 |
Novant Health Wilmington NC Marathon (Marathon Relay|Kids 1 mile Glow Run|Marathon|Half Marathon|5K) |
Wrightsville Beach, North Carolina, United States |
| 25 Feb 2023 |
Victory (Half Marathon) |
Richmond, California, United States |
| 25 Feb 2023 |
Sycamore Canyon (50 K|100 K) |
Poway, California, United States |
| 25 Feb 2023 |
Run Ridge Run 13km (13km) |
Port Moody, British Columbia, Canada |
| 25 Feb 2023 |
Salmon Falls 50k (50K) |
Coloma, California, United States |
| 25 Feb 2023 |
Mt. Mitchell Challenge & Black Mountain Marathon (Marathon|40 Miler) |
Black Mountain, North Carolina, United States |
| 25 Feb 2023 |
Red Dirt Ultra (100 Miler|100K) |
Lotus, Louisiana, United States |
| 26 Feb 2023 |
Las Vegas Marathon (Half Marathon|Marathon) |
Clark County, Nevada, United States |
| 26 Feb 2023 |
Ventura Marathon (Half Marathon|Marathon) |
Ojai, California, United States |
| 03 Mar 2023 |
Jackpot Ultra Running Festival (100 Miler - Friday Short Course) |
Henderson, Nevada, United States |
| 04 Mar 2023 |
Singletrack Stampede (22K|10k) |
Calabasas, California, United States |
| 04 Mar 2023 |
Way Too Cool (50K) |
Cool, California, United States |
| 04 Mar 2023 |
Seneca Creek Greenway Trail Marathon, 50K & Relay (50k) |
Gaithersburg, Maryland, United States |
| 05 Mar 2023 |
Napa Valley Marathon & Half (Marathon) |
Napa Valley, California, United States |
| 11 Mar 2023 |
Mesquite Canyon Trail Runs (1/2 Marathon|30K|50K|50 Miler|8K) |
Waddell, Arizona, United States |
| 11 Mar 2023 |
Griffith Park Trail Marathon (50K|Marathon|1/2 Marathon|10k|30K) |
Los Angeles, California, United States |
| 11 Mar 2023 |
Old West 50k, Marathon, and Half Marathon (50k|Marathon|Half Marathon) |
Julian, California, United States |
| 11 Mar 2023 |
Antelope Canyon (100 Miler) |
Page, Arizona, United States |
| 11 Mar 2023 |
Catalina Island Marathon (Marathon|10K|5K) |
Avalon, California, United States |
| 15 Mar 2023 |
TransGranCanaria (42K|82K|125K) |
Agaeta, Las Palmas, Spain |
| 17 Mar 2023 |
Ultra Trail Mt. Fuji (100 Miler) |
Fuji-shi, Shizuoka, Japan |
| 18 Mar 2023 |
Chuckanut 50k (50k) |
Bellingham, Washington, United States |
| 18 Mar 2023 |
Ohio's Backyard Ultra (Last Person Standing - Night Course|Last Person Standing - Day Course) |
Lucasville, Ohio, United States |
| 18 Mar 2023 |
Nine Trails 35 Mile Endurance Run (35 Miler|17 Miler) |
Santa Barbara, California, United States |
| 18 Mar 2023 |
Northburn 100 (100 Miles) |
Pisa Moorings, Auckland, New Zealand |
| 18 Mar 2023 |
False Spring Trail Runs (10k|20k) |
Laporte, Indiana, United States |
| 21 Mar 2023 |
Tyger Run/Walk (10km) |
Tyger Valley, Western Cape, South Africa |
| 23 Mar 2023 |
Antelope Island Buffalo Run (100 Miler) |
Syracuse, Utah, United States |
| 24 Mar 2023 |
Greenbrier Ultras (100 Mile Endurance Run) |
Greenbrier, Maryland, United States |
| 25 Mar 2023 |
Blood, Sweat, & Beers (50K|10K|30K|Marathon|1/2 Marathon|5K) |
Boulder City, Nevada, United States |
| 25 Mar 2023 |
Lake Martin 100 (100 Miler|50 Miler) |
Tallapoosa County, Alabama, United States |
| 25 Mar 2023 |
VALENCIA Trail Race (50K|10K|Half Marathon) |
Valencia, California, United States |
| 25 Mar 2023 |
Behind the Rocks (50 Miler|30K|50K) |
Moab, Utah, United States |
| 25 Mar 2023 |
Prairie Spirit Trail (100 Miler) |
Ottawa, Kansas, United States |
| 25 Mar 2023 |
Crown King Scramble (50K) |
Phoenix, Arizona, United States |
| 25 Mar 2023 |
Georgia's Death Race (68 miler) |
Blairsville, Georgia, United States |
| 26 Mar 2023 |
San Diego Half Marathon (Half Marathon) |
San Diego, California, United States |
| 26 Mar 2023 |
White Mountains 100 (100 Miler) |
Fairbanks, Alaska, United States |
| 31 Mar 2023 |
Badger Mountain Challenge (50 Miler|100 Miler) |
Richland, Washington, United States |
| 31 Mar 2023 |
Gorge Waterfalls (50K|100K) |
Cascade Locks, Oregon, United States |
| 01 Apr 2023 |
St. George Marathon (Marathon) |
St. George, Utah, United States |
| 01 Apr 2023 |
END-SURE (100 Miler) |
Power, North Dakota, United States |
| 01 Apr 2023 |
American River (50 Miler) |
Folsom, California, United States |
| 01 Apr 2023 |
Northern Traverse (190 Miles) |
Copeland, England, United Kingdom |
| 01 Apr 2023 |
Umstead 100 (100 Miles) |
Raleigh, North Carolina, United States |
| 01 Apr 2023 |
Brazos Bend (50 Miler|25K|50K) |
Needville, Texas, United States |
| 01 Apr 2023 |
GORTEX Grand Traverse (Grand Traverse) |
Crested Butte, Colorado, United States |
| 01 Apr 2023 |
Iron Furnace Trail Run (4.5 Miler|1/2 Marathon) |
Mcarthur, Ohio, United States |
| 02 Apr 2023 |
Peterson Ridge Rumble (40 Miler|20 Miler) |
Sisters, Oregon, United States |
| 02 Apr 2023 |
GO! St. Louis Marathon Weekend (Half Marathon|Marathon|10K ) |
Saint Louis, Missouri, United States |
| 02 Apr 2023 |
Pay What You Want Tauranga Half Marathon (Matua Mile|5km|Half Marathon|10km|15km) |
Tauranga, Waikato, New Zealand |
| 07 Apr 2023 |
Zumbro Endurance Run (100 Miler) |
Theilman, Minnesota, United States |
| 08 Apr 2023 |
Smith Rock Ascent (50K|15 Miler|4-Miler) |
Terrebonne, Oregon, United States |
| 08 Apr 2023 |
Dirty Kiln Trail Races - REVERSE (Short Course - 10K|Long Course - (Second Loop aka The Back Half)) |
Hollidaysburg, Pennsylvania, United States |
| 08 Apr 2023 |
Rattler Trail Races (25K|10K) |
Colorado Springs, Colorado, United States |
| 8-15 Apr 2023 |
Whiskey Basin Trail Runs (57k|31k|92K|1/2 Marathon|10K) |
Prescott, Arizona, United States |
| 08 Apr 2023 |
South Downs Way 50 (50 Miles) |
Worthing, England, United Kingdom |
| 08 Apr 2023 |
Lake Sonoma 50 (50 Miler) |
Healdsburg, California, United States |
| 08 Apr 2023 |
Silver Moon Race (6-Hours|100-Miles|24-Hours|12-Hours) |
Reedley, California, United States |
| 08 Apr 2023 |
Silver Moon Race (100 Miles) |
Fresno County, California, United States |
| 12 Apr 2023 |
Born to Run (100M) |
Santa Ynez, California, United States |