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
7 listedStarted · Through
Sri Chinmoy Self-Transcendence 3100 Mile Race
Jamaica, Queens, New York City, New York, USA
Fixed-Distance
Follow organizer updates ↗Started · Through
Australian 6 Day Ultramarathon Festival
Paradise, South Australia, Australia
6-Day
Follow organizer updates ↗Started · Through
MDS 120 Morocco
Ouarzazate Province, Morocco
Stage Race
Follow organizer updates ↗
Next 30 days
23 racesStarting after today, through Nov 2, 2026.
48 Heures de Royan
Royan, France
48-Hour
Kodiak 100M
Big Bear Lake, California, USA
Fixed-Distance
Moab 240
Moab, Utah, USA
200+ Mile
OG Yeti 100 Mile Endurance Run
Abingdon, Virginia, USA
Fixed-Distance
Latest results
Ultra X Jordan
Kevin Higgins won Ultra X Jordan 2026 in 22:21:51 across five stages. Line Caliskaner won the women's race in 23:05:19, second overall. 54 of the 62 listed runners completed all five stages.
Read results →A Lenda Backyard Ultra
Guilherme Santos Victor won the 2026 A Lenda Backyard Ultra with 18 yards (120.708 km). Douglas Silva provided the assist with 17 yards, and Jannicken Versori ran the most yards among women with 14.
Read results →Lisboa Backyard Ultra
Henrique Alves won the 2026 Lisboa Backyard Ultra with 22 yards (147.532 km). André Costa provided the assist with 21 yards (140.826 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.
Most read
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.