The Practical Guide to Ultra Endurance
Learn to Go Farther
Than One Day
Find a race, adapt a training framework, and build a pacing or crew plan for 24-hour, 48-hour, six-day, backyard, and stage events.
Around the race calendar
Races & Results
Calendar snapshot: . Race windows follow listed dates; organizers provide live updates.
Racing now
2 listedStarted
River-Run Backyard Ultra
A&P Showgrounds, Waipukurau, Central Hawke’s Bay, New Zealand
Backyard Ultra
Follow organizer updates ↗Started · Through
Snowman Race
Laya, Gasa, to Bumthang, Bhutan
Stage Race
Follow organizer updates ↗
Next 30 days
34 racesStarting after today, through Nov 25, 2026.
Himalayan 100 Mile Stage Race
Maneybhanjang, near Darjeeling, India
Stage Race
Chartreuse Backyard Ultra
Saint-Laurent-du-Pont, Isère, France
Backyard Ultra
Kullamannen Ultra 100 Miles
Höganäs to Båstad, Sweden
Fixed-Distance
Mallorca by UTMB
Estellencs to Port de Sóller, Mallorca, Spain
Fixed-Distance
Latest results
ISOPOL Super24
The published 24-hour timing results list Octavian Ciorescu first with 249.561 km and Szilvia Hudák first woman with 204.765 km; final confirmation remains pending.
Read results →Smurf's Backyard Ultra
Murray Macpherson and Ben Sinnott both completed 24 yards (about 161 km) and stopped together, so the race had no winner, while Kelly Romano was last woman standing with 23 yards.
Read results →Laufwochenende Brugg
Julia Fatton covered 329.397 km in the 48-hour race; Christian Stolovitz led the men with 316.897 km.
Read results →
What Are You Planning?
Choose a format →
Compare the clock, course, support, and withdrawal options before you enter.
Find your next race →
Search by place, then filter race format, region, and terrain. Official links let you check entry details.
Build a pacing scenario →
For example: 120 km in 24 hours with two hours stopped leaves 22 moving hours, or 11:00 per km. Change the assumptions to see the effect.
The pacing example illustrates arithmetic, not a recommended race target. Explore all planning tools →
Beyond the marathon
What Is Multiday Running?
Multiday running covers events whose clock or stages extend through day-night cycles or across several days. From 24-hour tracks to week-long stage races, the format makes walking, food, rest, equipment, support, and changing conditions part of the plan.
New to the broader sport? Start with how long an ultramarathon is and how fixed-distance, timed, and multiday formats differ.
Read the full introduction →
Not Just Speed
Pacing, food tolerance, rest, equipment, and problem-solving can matter alongside fitness.
Mental Skills Matter
Boredom, motivation, and problem-solving can influence persistence alongside physical fitness.
A Community Sport
Crews, pacers, aid station volunteers, and fellow runners all shape the race.
Find your format
Choose Your Path
Multiday running comes in many formats. Each demands different preparation, strategy, and gear. Compare the rules, support, withdrawal plan, and skills you are prepared to practice.
Selected guides
Featured Guides
How to Train for Your First 24-Hour Race
Read guide →Backyard Ultras Explained: Rules, Records, and Safety
Read guide →24-Hour Race Pacing Strategy
Read guide →Backyard Ultra Race Strategy
Read guide →What to Eat During a 24-Hour Race
Read guide →Blister Prevention for Ultramarathons
Read guide →From the Research
Our guides draw on current exercise physiology, biomechanics, and sports psychology research where evidence exists, with uncertainty and study limits explained. Read our editorial policy for how sources, illustrative examples, and professional review are distinguished.
Odds ratio linking higher boredom with an action crisis in one mixed solo/relay 24-hour study
A better race-day rule
Persistence Never Outranks Safety
Ordinary fatigue and doubt may pass. Confusion, involuntary sleep, loss of coordination, collapse, chest pain, severe breathing difficulty, or repeated vomiting call for a stop and medical assessment—not a motivational slogan.