| 13 Apr 2023 |
Potowatomi (50 Miler) |
Pekin, Illinois, United States |
| 13 Apr 2023 |
Beyond Limits Ultra (100M) |
Henderson, Nevada, United States |
| 15 Apr 2023 |
Two Oceans Marathon (56K|Half Marathon) |
Cape Town, Western Cape, South Africa |
| 15-16 Apr 2023 |
Hogeye Marathon (5K|Marathon|Half Marathon|10K) |
Springdale, Arkansas, United States |
| 15 Apr 2023 |
Oriflamme 50k (50km) |
Julian, California, United States |
| 15 Apr 2023 |
Yakima Skyline Rim 50k (50K) |
Ellensburg, Washington, United States |
| 15 Apr 2023 |
Woodside/Purisima Creek Crossover (50K|35K) |
Redwood City, California, United States |
| 15 Apr 2023 |
Winter Warrior Finland (Warrior Squad / Race Squad|Challenge) |
Ylläs, LL, Finland |
| 15 Apr 2023 |
Zion Ultras (50 K|Half Marathon|100 Mile|100 K) |
Virgin, Utah, United States |
| 16 Apr 2023 |
Bend Marathon (Marathon) |
Bend, Oregon, United States |
| 16 Apr 2023 |
Vancouver Sun Run (10 K) |
Vancouver, British Columbia, Canada |
| 16 Apr 2023 |
Bitterroot Runoff Trail Runs (10 Mile|5 Mile|5k) |
Lolo, Montana, United States |
| 17 Apr 2023 |
Boston Marathon (Marathon) |
Boston, Massachusetts, United States |
| 19 Apr 2023 |
Double Top 100 Stone Anvil (100 Miler) |
Hasslers Mill, Georgia, United States |
| 21 Apr 2023 |
Dublin to Belfast (173 km) |
Dublin, Leinster, Ireland |
| 22 Apr 2023 |
Zane Grey (100K) |
Pine, Arizona, United States |
| 22 Apr 2023 - 20 Apr 2024 |
Leona 2023 - Back to Lake Hughes! (100k |50 mile |30k|55k|100 mile ) |
Lake Hughes, California, United States |
| 22 Apr 2023 |
Mad City Ultras (100k|50k) |
Madison, Wisconsin, United States |
| 22 Apr 2023 |
Hyner Trail Challenge (25K|50K) |
Hyner, Pennsylvania, United States |
| 22 Apr 2023 |
Royal Gorge Groove (20K|50K|5K|12.5K|30K) |
Buckskin Joe, Colorado, United States |
| 22 Apr 2023 |
Sinister Night Runs (6K|27K|18K|9K|54K) |
Pinal County, Arizona, United States |
| 22 Apr 2023 |
Dunes 100 (100 Miler) |
Hell Gate, Florida, United States |
| 23 Apr 2023 |
Big Sur International Marathon (Marathon) |
Big Sur, California, United States |
| 26 Apr 2023 |
Thames Ring 250 (250 Miles) |
Streatley, England, United Kingdom |
| 28 Apr 2023 |
The Canyons Endurance Runs (100K|100 Miles|25K|50K) |
Foresthill, California, United States |
| 29 Apr 2023 |
C&O Canal 100 (100 Miles) |
Water Acres, Maryland, United States |
| 29 Apr 2023 |
Grit OCR (Claw - 8-Miles|Fang - 5-Miles) |
Santa Clarita, California, United States |
| 30 Apr 2023 |
Reno Connector Run (10K) |
Reno, Nevada, United States |
| 30 Apr 2023 |
Eugene Marathon (Marathon) |
Eugene, Oregon, United States |
| 01 May 2023 |
Cocodona 250 (250 Miler) |
Rock Springs, Arizona, United States |
| 03 May 2023 |
Sentinel Hill Climb (1.6 Miles, 1,900 feet of climbing) |
Missoula, Montana, United States |
| 03 May 2023 |
Snowbowl 15k (15k) |
Missoula, Montana, United States |
| 05 May 2023 |
Tillamook Burn Trail Run (50K) |
Tillamook State Forest, Oregon, United States |
| 05 May 2023 |
Salt Flats Endurance Runs (100 Miler|50 Miler) |
Wendover, Utah, United States |
| 06 May 2023 |
Thames Path 100 (100 Miles) |
London, England, United Kingdom |
| 06 May 2023 |
McDonald Forest 50k (50K) |
Benton County, Oregon, United States |
| 06 May 2023 |
Collegiate Peaks Trail Run (25 Miler|50 Miler) |
Buena Vista, Colorado, United States |
| 06 May 2023 |
Riverlands 100 (100 Miler) |
Auburn Plains, Maine, United States |
| 06 May 2023 |
Miwok 100k (100k) |
Stinson Beach, California, United States |
| 06 May 2023 |
Breakneck Point Trail Runs (21K|42K) |
Beacon, New York, United States |
| 06 May 2023 |
Yosemite Half Marathon (Half Marathon) |
Yosemite National Park, California, United States |
| 06 May 2023 |
Pen Llyn Ultra (50 Miles|75 Miles|100 Miles) |
Y Ffor, Wales, United Kingdom |
| 06 May 2023 |
Quad Rock 50 (50 Miler|25 Miler) |
Fort Collins, Colorado, United States |
| 07 May 2023 |
Toronto Marathon (5K|Marathon|Half Marathon|10K) |
Toronto, Ontario, Canada |
| 07 May 2023 |
Tamworth All-Schools Mountain Bike Event (Primary All-Schools MTB Event|Secondary All-Schools MTB Event) |
Tamworth, New South Wales, Australia |
| 07 May 2023 |
BMO Vancouver Marathon (Half Marathon|Marathon) |
Vancouver, British Columbia, Canada |
| 08 May 2023 |
Klipspringer Challenge (Klipspringer Lite Day One|Klipspringer Challenge Day One|Klipspringer Lite Day Two|Klipspringer Challenge Day Two) |
Augrabies, Northern Cape, South Africa |
| 12-14 May 2023 |
Ultra-Trail Snowdonia (30 Miles|50 Miles|100 Miles) |
Fachwen, Wales, United Kingdom |
| 12 May 2023 |
Thunderbunny Trail Races (25K|11K|50K) |
Athens, Ohio, United States |
| 12 May 2023 |
Hellbender 100 (Mens 100 Mile) |
Old Fort, North Carolina, United States |
| 13 May 2023 |
Quicksilver (100K|50K) |
San Jose, California, United States |
| 13 May - 12 Aug 2023 |
Swiss Alps 100 (Kids Run Mini and Rookies|Kids Run Youngsters|For Sportograf|virtual 400KM|virtual 800KM|Vertical|160KM|Course Directional Signs Map|50KM|100KM) |
Fiesch, Valais, Switzerland |
| 13 May 2023 |
Zegama-Aizkorri (Marathon) |
Zegama, Basque Country, Spain |
| 13 May 2023 |
PCT 50 (50 Miler) |
Cleveland National Forest, California, United States |
| 13 May 2023 |
Ram Party (24K|33K|50 Mile|50K|5K|16K) |
Colorado Springs, Colorado, United States |
| 13 May 2023 |
Ultra-Trail Austrailia (50k|100k) |
Katoomba, New South Wales, Australia |
| 13 May 2023 |
Ice Age Trail Endurance Runs (50k|Half Marathon|50 Miler) |
La Grange, Wisconsin, United States |
| 13 May 2023 |
Survival of the Fittest 18k (18k) |
Squamish, British Columbia, Canada |
| 13 May 2023 |
Survival of the Fittest 35k (35k) |
Squamish, British Columbia, Canada |
| 13 May 2023 |
Devon Coast to Coast (117 Miles) |
South Hams, England, United Kingdom |
| 14 May 2023 |
NJ Ultra Festival (100 Miles) |
Hardwick Center, New Jersey, United States |
| 19 May 2023 |
Cruel Jewel 100 (100 Miler) |
Blairesville, Georgia, United States |
| 19 May 2023 |
Infinitus (100 Miler) |
Goshen, Vermont, United States |
| 20 May 2023 |
North Downs Way 50 (50 Miles) |
Waverley, England, United Kingdom |
| 20 May 2023 |
Yamacraw (20K|50K) |
Stearns, Kentucky, United States |
| 20 May 2023 |
Sun Mountain (50K) |
Winthrop, Washington, United States |
| 20 May 2023 |
Massanutten Mountain Trails 100 (100 Miler) |
Kings Crossing, Virginia, United States |
| 20 May 2023 |
Rock N Run Bahia 2023 (5K) |
Bahia De Caraquez, California, United States |
| 20 May 2023 |
Grim Reaper Running Festival (100 Miles) |
South Kesteven, England, United Kingdom |
| 20 May 2023 |
Bryce Canyon Ultras (100 Miler|50k|50 Miler) |
Bryce Canyon, Utah, United States |
| 20 May 2023 |
Bishop High Sierra Ultras (50 Miler|55K|100K) |
Bishop, California, United States |
| 20 May 2023 |
Quest for the Crest Trail Races (50K) |
Burnsville, North Carolina, United States |
| 20 May 2023 |
O'Neill Park Trail Races (30K|Half Marathon|10K|50K) |
Trabuco Canyon, California, United States |
| 20 May 2023 |
Jemez Mountain (50K|15 Miler|50 Miler) |
Los Alamos, New Mexico, United States |
| 21 May 2023 |
Mountains 2 Beach (Half-Marathon|Marathon) |
Ojai, California, United States |
| 21 May 2023 |
Bear Mountain (12 km|8 km) |
Mission, British Columbia, Canada |
| 25 May 2023 |
Pigtails Challenge (100 Miler) |
King County, Washington, United States |
| 27 May 2023 |
Nanny Goat 100 (100 Miler) |
Riverside, California, United States |
| 27 May 2023 |
Stumptown Trail Runs (1/2 Marathon|50K) |
Portland, Oregon, United States |
| 27 May 2023 |
Chester Ultra 100 (100 Miles) |
Waverton, England, United Kingdom |
| 27 May 2023 |
Grand Union Canal (145 Miles) |
Birmingham, England, United Kingdom |
| 28 May 2023 |
Saskatchewan Marathon (42.2k|5k|21.1.k|10k) |
Saskatoon, Saskatchewan, Canada |
| 28 May 2023 |
Calgary Marathon (10K|50K|Half Marathon|Kid's Run|5K|Marathon) |
Calgary, Alberta, Canada |
| 02 Jun 2023 |
San Diego 100 (100 Miler) |
Lake Cuyamaca, California, United States |
| 03 Jun 2023 |
REVEL Mt. Hood (Half Marathon|Marathon) |
Portland, Oregon, United States |
| 03 Jun 2023 |
Loco Race Series (100 Miler) |
Butte Meadows, California, United States |
| 03 Jun 2023 |
Scout Mountain Trail Ultras (100 Miler) |
Pocatello, Idaho, United States |
| 03 Jun 2023 |
Whiting Ranch Trail Races (10k|30k |Half Marathon ) |
Trabuco Canyon, California, United States |
| 03 Jun 2023 |
Mohican 100 (100M) |
Loudonville, Ohio, United States |
| 03 Jun 2023 |
Worlds End Ultramarathon (50k|100k) |
Forksville, Pennsylvania, United States |
| 03 Jun 2023 |
Old Dominion 100 Mile (100 Miler) |
Fort Valley, Virginia, United States |
| 03 Jun 2023 |
Hell Hole Hundred (100M) |
Charleston, South Carolina, United States |
| 09 Jun 2023 |
SAMO 100 Mile/100k (100 Miler|100k) |
Malibu, California, United States |
| 09 Jun 2023 |
Warhammer 100 (100 Miler) |
Slade, Kentucky, United States |
| 10 Jun 2023 |
South Downs Way 100 (100 Miles) |
Winchester, England, United Kingdom |
| 10 Jun 2023 |
Flagstaff Extreme Big Pine Trail Runs (53K) |
Coconino County, Arizona, United States |
| 10 Jun 2023 |
Holcolm Valley Trail Run (7 Miles|33 Miles|15 Miles) |
Minnelusa, California, United States |
| 10 Jun 2023 |
River of No Return (53k) |
Challis City Park, Idaho, United States |
| 10 Jun 2023 |
Warhammer 100 (100 Miler) |
Slade, Kentucky, United States |
| 10-11 Jun 2023 |
Cool Moon 100 (Cool Moon 11.5 miler (South Loop)|Cool Moon 100K|100 Miler|Cool Moon 25 miler|Cool Moon 5K|Cool Moon 13.5 mile (North Loop)|Cool Moon 50 miler) |
Cool, California, United States |