Two days of continuous decisions
48-Hour Races
A two-day fixed-time race where sleep, recovery choices, and the second night become central parts of the plan.
How the Format Works
A 48-hour race extends the familiar fixed-time model across two full day-night cycles. Runners accumulate distance on a measured course while choosing when to walk, eat, change, rest, or sleep.
The second night changes the problem. Early pacing errors, food fatigue, foot damage, and sleep loss can compound, so the best plan is a set of tested options rather than one rigid mileage or sleep schedule.
Curated preparation path
Learn, Train, and Plan
Understand the Format
Learn what the extra day changes and compare it with shorter and longer timed races.
48-Hour Races Explained
Rules, sleep, pacing, common course setups, and safety considerations.
Guide24-Hour vs 48-Hour vs 6-Day
Compare the practical demands of the three core fixed-time formats.
AnswerCan You Sleep During an Ultramarathon?
How rules, duration, safety, and individual goals shape rest decisions.
Build the Training Plan
Prepare for durable movement and logistics without using deliberate sleep deprivation as routine training.
How to Train for a 48-Hour Race
An adaptable framework for volume, back-to-back work, walking, and race rehearsals.
GuideTapering for Multiday Races
Arrive rested while keeping familiar movement and preparation habits.
ToolMultiday Pace Calculator
Test moving-time, sleep, break, and average-distance scenarios.
Plan Both Nights
Create options for alertness, sleep, pacing, food, and support before fatigue narrows your judgment.
Sleep Strategy for Multiday Races
Plan flexible rest options and clear triggers for stopping safely.
GuideThe Second Night Survival Guide
Recognize the second-night risks and simplify decisions before they arrive.
GuideCrew and Aid Station Strategy
Design a repeatable support flow that works when communication gets harder.
Fuel and Protect
Use adaptable food, fluid, footwear, and foot-care systems across changing conditions.
Hydration and Sodium
Use thirst as a starting signal and understand the danger of forced overdrinking.
Gear guideFoot Care Kit for Multiday Running
Pack and practice a simple response system for moisture, friction, and hot spots.
ToolInteractive Gear Checklist
Build a complete packing list for two days of changing conditions.
Curated race directory
Active and Upcoming 48-Hour Events
2 matching events as of Jul 31, 2026; directory reviewed June 2026. 1 past edition remain in the directory archive.
International Ultramarathon Festival — Loutraki
Loutraki, Greece
The 21st edition of this World Cup festival on a 400m tartan track. Features 48-hour, 24-hour, and 12-hour races in a supportive Mediterranean setting.
View verified race details →Across the Years
Peoria, Arizona, USA
A legendary multi-day running festival spanning New Year's Eve. Offers 6-hour to 6-day fixed-time races plus fixed-distance options. Organized by Aravaipa Running.
View verified race details →Dates, entry status, routes, and rules can change. Use each event page's official organizer links before registration or travel. Format preparation paths were reviewed July 30, 2026.
48-Hour FAQs
Is a 48-hour race simply twice as hard as a 24-hour race?
No single multiplier describes the difference. The second day adds sleep decisions, repeated foot and skin care, appetite changes, and more opportunities for small pacing or logistics errors to accumulate.
Should you practice running through the night?
Routine sleep-deprivation training is not necessary. A controlled session can test lighting, layers, food, safety, and late-hour logistics, but it should have a safe route, a clear purpose, and protected recovery afterward.
How much should you sleep in a 48-hour race?
There is no universal schedule. Prepare multiple rest options and use alertness, coordination, symptoms, goals, and race conditions to decide. Confusion, repeated falls, hallucinations, or involuntary sleep require prompt assessment.
Compare Related Formats
24-Hour Races
A fixed-time race where the clock runs for one full day and every completed lap or measured distance counts.
6-Day Races
A 144-hour fixed-time event where sustainable routines and recovery choices matter across nearly a full week.
Backyard Ultras
A last-person-standing format built around one 6.7056 km loop every hour, on the hour, until only one finisher remains.