Data

This week’s ultramarathon race results includes Kettle Moraine 100, Laurel Highlands, McKenzie River Trail 50K, and Tahoe 200.

This weekend’s ultramarathon race results include Scout Mountain Ultras, Old Dominion, Dam Yeti, and Trail La Clinique Du Coureur.

This week’s ultramarathon race results include Mohican Trail 100, Worlds End Ultramarathon, North Fork 50, and Smith Rock Classic.

This week’s ultramarathon race results include Sulphur Springs Trail Race, Stumptown Trail Runs, Adrenaline Trail Runs, and Sugar Badger Trail Races.

This week’s ultramarathon race results include Cruel Jewel, Tillamook Burn, Massanutten, and Superior Spring Trail Race.

Cocodona 250 race results plus Ice Age Trail 50, Quad Rock 50, and Quicksilver ultramarathon results.

This week’s ultramarathon race results include Strolling Jim, Miwok 100K, San Diego 100, and McDonald Forest 50K.

This week’s ultramarathon race results include The Canyons Endurance Runs™ by UTMB®, C&O Canal 100, Thumb Coast Ultra & Relay, and Promise Land 50K++.

This year’s ultramarathon race results include Hyner Trail Challenge, Puerto Vallarta by UTMB, Quachita Trail, and Whiskey Basin Trail Runs.

This week’s ultramarathon race results include Mad City Ultras, Gorge Waterfalls, Zumbro Endurance Run, and Lake Sonoma.

This week’s ultramarathon race results include Bull Run Run 50, American River 50, Diablo Trails Challenge, and Weymouth Woods 50K.

March 28-29, 2026 ultramarathon race results include Crown King Scramble, Umstead 100, Behind the Rocks, and The Georgia Death Race.

This weekend’s ultramarathon race results include Chuckanut 50K, HAT 50K, Mount Mitchell Heartbreaker, and The Big Alta.

This week’s ultramarathon race results include Marin Ultra Challenge, Pistol Ultra, Land Between the Lakes, and Mesquite Canyon.

The first full weekend in March saw 57 races on UltraRunning Magazine’s North American race calendar. In this week’s Ultra Weekend Recap, we highlight race results from Arizona, California, Tennessee and Maryland. …

This week’s ultramarathon race results include Moab’s Red Hot Ultra, Copper Corridor, Hashawha Hills 50K, and Orcas Island 100.

This weekend’s ultramarathon race results include Jackpot Ultra Running Festival, FOURmidable 50K, LOViT, and Cabin Fever 50K.

This weekend’s ultramarathon results include Black Canyon Ultras, the Barkley Marathons, Rocky 50, and the Ranch 50K.

This weekend’s ultramarathon race results includes Rocky Raccoon 100, Elephant Mountain, Algonquin 50K, Monterey 50 Ultra, and Fort Ord Trail Runs.

This weekend’s ultramarathon race results include Arches Ultra, Winter Deception Pass 50K, Sean O’Brien Trail Races, and Dark Anchor.

This week’s ultramarathon race results include Mountain Mist, Golden Gate Trail Classic, Wilson Frozen Creek 50K, and Clearwater Marathon Running Festival.

This weekend’s ultramarthon race results include HURT 100, Coldwater Rumble, Long Haul 100, and Southern Tour Ultra.

This weekend’s ultramarathon results include Bandera, Avalon Benefit 50, San Tan Scramble, and San Diego 50 & Trail Runs.

This weekend’s ultramarathon results include Across the Years, Recover from the Holidays 50K, Run Undead Ultra Trail Party, and Croom Zoom.

This weekend’s ultramarathon results include Trail of Fears, Loop Out the Year, and Run for the Ranch.

This weekend’s ultramarathon race results include Habanero Hundred, Black Spur Ultra, Midwest States 100, and Continental Divide Trail Run.

We have listed the top graded performances for each commonly run ultra distance. These rankings are determined by using the Comparative Difficulty Ratios developed by Gary Wang at RealEndurance.com.