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| Ouray 100 Mile Endurance Runouray100.com (opens in a new tab) |  United States | OurayUnited States | ouray100.com (opens in a new tab) |
| The Guzzler Ultratheguzzlerultra.com.au (opens in a new tab) |  Australia | BrisbaneAustralia | theguzzlerultra.com.au (opens in a new tab) |
| Engadin Ultra Trailengadinultratrail.ch (opens in a new tab) |  Switzerland | SamedanSwitzerland | engadinultratrail.ch (opens in a new tab) |
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| Eiger Ultra Traileiger.utmb.world (opens in a new tab) | Switzerland | GrindelwaldSwitzerland | eiger.utmb.world (opens in a new tab) |
| Zagori Mountain Runningzagorirace.gr/en (opens in a new tab) |  Greece | ΤσεπέλοβοGreece | zagorirace.gr/en (opens in a new tab) |
| Maintal Ultratrailmtut.de (opens in a new tab) |  Germany | VeitshöchheimGermany | mtut.de (opens in a new tab) |
| Silverton Alpine Marathonsaravaiparunning.com/silverton-alpine/ (opens in a new tab) | United States | SilvertonUnited States | aravaiparunning.com/silverton-alpine/ (opens in a new tab) |
| Tryavna Ultratryavna-ultra.com (opens in a new tab) |  Bulgaria | TryavnaBulgaria | tryavna-ultra.com (opens in a new tab) |
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| Grossglockner Ultra-Trailultratrail.at (opens in a new tab) |  Austria | KaprunAustria | ultratrail.at (opens in a new tab) |
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| Wy'east Trailfestdaybreakracing.com/wyeast-trailfest (opens in a new tab) | United States | Mt. HoodUnited States | daybreakracing.com/wyeast-trailfest (opens in a new tab) |
| San Francisco Marathonthesfmarathon.com (opens in a new tab) | United States | San FranciscoUnited States | thesfmarathon.com (opens in a new tab) |
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| Lean Horse Ultra Marathonleanhorseultra.com (opens in a new tab) | United States | CusterUnited States | leanhorseultra.com (opens in a new tab) |
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| Round the Rockroundtherock.co.uk (opens in a new tab) |  United Kingdom | St HelierUnited Kingdom | roundtherock.co.uk (opens in a new tab) |
| Dartmoor Big Day Outpuretrail.uk/bigdayout (opens in a new tab) | United Kingdom | BelstoneUnited Kingdom | puretrail.uk/bigdayout (opens in a new tab) |
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| Skyline 50K Endurance Runscenaperformance.com/events/skyline-50k (opens in a new tab) | United States | Castro ValleyUnited States | scenaperformance.com/events/skyline-50k (opens in a new tab) |
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| The MTC Cotswold Ultraultrarunningltd.co.uk/race/the-cotswold-ultra (opens in a new tab) | United Kingdom | CirencesterUnited Kingdom | ultrarunningltd.co.uk/race/the-cotswold-ultra (opens in a new tab) |
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| Swiss Alps 100swissalps100.com (opens in a new tab) | Switzerland | FieschSwitzerland | swissalps100.com (opens in a new tab) |
| The MTC Oxford Ultraultrarunningltd.co.uk/race/the-oxford-ultra (opens in a new tab) | United Kingdom | OxfordUnited Kingdom | ultrarunningltd.co.uk/race/the-oxford-ultra (opens in a new tab) |
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| Stour Valley Path 100K and 50K Ultra Runsvp100.co.uk (opens in a new tab) | United Kingdom | NewmarketUnited Kingdom | svp100.co.uk (opens in a new tab) |
| The MTC Windsor Ultraultrarunningltd.co.uk/race/the-windsor-ultra (opens in a new tab) | United Kingdom | Henley-on-ThamesUnited Kingdom | ultrarunningltd.co.uk/race/the-windsor-ultra (opens in a new tab) |
| Waldo 100K Ultramarathonwaldo100k.org (opens in a new tab) | United States | Cascade SummitUnited States | waldo100k.org (opens in a new tab) |
| Sheep Mountain Trail Runshumanpotentialrunning.com/sheep-mountain-50 (opens in a new tab) | United States | FairplayUnited States | humanpotentialrunning.com/sheep-mountain-50 (opens in a new tab) |
| Allgäu Panorama Marathonallgaeu-panorama-marathon.de (opens in a new tab) | Germany | SonthofenGermany | allgaeu-panorama-marathon.de (opens in a new tab) |
| Volcanicgobeyondracing.com/races/volcanic-50 (opens in a new tab) | United States | CougarUnited States | gobeyondracing.com/races/volcanic-50 (opens in a new tab) |
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| Monschau Marathonmonschau-marathon.de (opens in a new tab) | Germany | MonschauGermany | monschau-marathon.de (opens in a new tab) |