Ultramarathon Running: A Complete Guide to Running Beyond the Marathon Distance

Quick Intro

Ultramarathon running is a high-impact cardio exercise performed by running any distance beyond 42.195 kilometers, often well beyond it. It is the longest and most demanding form of endurance running.

Equipment Needed

No equipment is required beyond footwear suited to long distances. Beyond that, planning for extended fueling, hydration and a walk-run strategy matters far more than any single piece of gear.

Why Ultramarathon Running Matters

Footing and sure-footed control matter more here than they do over a road marathon such as Marathon Running. That difference shows up in how these distances are usually covered: many ultramarathons run over technical trail and varied terrain, and disciplined walking, not continuous running, is often the faster overall strategy once climbs and fatigue enter the picture.

The glutes (gluteus maximus and gluteus medius), front of the thigh (quadriceps, specifically the rectus femoris) and back of the thigh (hamstrings, specifically the biceps femoris) drive every stride, whether running or power-hiking a climb. The calves (gastrocnemius and soleus) manage the push-off over many hours, the hip flexors (iliopsoas) swing the leg forward for the next stride and the lower back (erector spinae) and deep core (transverse abdominis) work together to hold posture long after the legs alone start to fade.

Cardiovascular endurance and muscular endurance are the two main demands, as in the marathon, and uneven ground adds a balance demand on top.

When to Do It

Ultramarathon running is the far end of a long structured build, not a session added into a normal training week. Most people attempt one, at most a small handful, of these distances a year, since recovery afterward takes considerably longer than a standard marathon.

• No established base with Marathon Running yet. Jumping straight to an ultra distance without a completed marathon and a comfortable long-run base raises injury and DNF risk substantially. Building up through the marathon distance first is the only reasonable path.
• Existing knee, hip or Achilles issues. Running is high-impact, and an ultra sustains that impact for longer than any other run, often on uneven terrain. Getting a joint or tendon issue properly evaluated before committing to an ultra training block is worth the time it takes.
• An uncontrolled cardiovascular condition. Few activities place the heart under sustained demand for as long as an ultramarathon effort does. A doctor should sign off before training for this distance begins.

An ultra attempt deserves months of structured, patient preparation built around these factors, not a rushed build compressed into a few weeks.

Getting Ready

The preparation for an ultramarathon happens across months of training, including deliberate practice on the specific terrain the event will cover. A short warm-up jog and a few dynamic leg swings settle the body before the start, the same as any other run.

Plan a walk-run strategy from the start rather than trying to run continuously. At these distances, disciplined walking on climbs preserves far more overall race time than pushing to run everything.

Step-by-Step Instructions

1. The plan. Decide in advance where walking breaks happen, typically on climbs, rather than deciding in the moment under fatigue.

2. The start. Settle into a conservative pace well below marathon effort, since the distance ahead is considerably longer.

3. The middle. Alternate running and disciplined walking as planned, using fueling and hydration at set intervals.

4. The finish. Manage the final stretch by focusing on form, fueling and the walk-run plan already in place, since this is where an overly ambitious early pace usually catches up.

How Many, How Often

A practiced walk-run strategy matters more here than raw weekly mileage, since disciplined walking on climbs is often what determines the final finish time.

Modifications and Variations

Ultramarathon running sits at the top of the distance ladder, with nothing longer above it.

For an easier entry point, Marathon Running covers the standard 42.195 kilometer distance this event extends past.

Progression path: Marathon Running → Ultramarathon Running

Move to an ultra attempt only once the marathon distance, and a walk-run and fueling strategy, both feel solved.

Common Mistakes to Avoid

Trying to run every step instead of planning walk breaks. It’s the opposite of how this distance is best covered. Planning disciplined walking on climbs from the start preserves far more overall time than pushing to run continuously.

Starting at marathon pace or faster. A pace that feels sustainable at 42 kilometers is often too fast for a distance well beyond it. Holding a deliberately conservative pace through the early miles protects the rest of the effort.

Under-fueling or under-hydrating over an extended duration. The longer the event, the more a fueling shortfall compounds. Practicing a fueling and hydration plan across long training days, not just hoping it works on the day, is what prevents a late collapse.

Skipping terrain-specific training. Training exclusively on flat, smooth ground when the event covers technical trail leaves the legs and balance underprepared for what shows up on the day. Practicing on similar terrain to the event, where possible, closes that gap.

After Your Set

Standing and hinging forward from the hips with soft knees, letting the arms hang toward the floor, releases the hamstrings and lower back after hours on the feet. Sitting on the floor with the legs extended and looping a towel or strap around the ball of one foot, gently pulling the toes back, stretches the calves and deep calf muscle (soleus) that pushed off for the entire distance. Structured recovery over the following days and weeks, not a single stretch session, matters more here than after any shorter run.

Going Deeper

A disciplined walk-run strategy, planned in advance, usually decides an ultramarathon result more than raw running fitness alone. A runner who tries to run every climb often arrives at the final stretch with far less left than a more disciplined pacer who walked the same climbs and saved the legs for the flatter, runnable sections. Treating the walk-run decision as a planned, trainable skill, not a fallback only reached for once things go wrong, is what determines how the final hours of the effort go.

Someone with a completed marathon and a comfortable long-run base already typically needs several months of structured training to build toward the first ultra attempt, with terrain-specific long training days becoming a regular fixture in the final third of the build.

How to Know You’re Improving

1. A completed marathon with a comfortable, controlled finish
2. A practiced walk-run strategy tested and refined across multiple long training days
3. A fueling and hydration plan that holds up across an extended duration without a late collapse
4. A full ultra distance finished with the walk-run plan followed as designed, not abandoned mid-event

A walk-run plan that holds up as designed through the final hours, not the finish time alone, is what separates a well-executed ultra from one that fell apart on the climbs.

Muscles Worked

• Gluteus Maximus (the largest glute muscle, extending the hip for distances well beyond a marathon)
• Gluteus Medius (a smaller glute muscle at the side of the hip, holding the pelvis through hours of accumulating damage)
• Rectus Femoris (the front of the thigh, moving the leg forward through walking sections as well as running ones)
• Biceps Femoris (a muscle at the back of the thigh, working on climbs and braking on long descents)
• Gastrocnemius (a calf muscle, pushing off over terrain that changes for hours at a time)
• Soleus (a deeper calf muscle beneath the gastrocnemius, loaded with no meaningful rest across the whole event)
• Iliopsoas (the deep hip flexor, still lifting the leg when the pace has dropped to a shuffle)
• Erector Spinae (the muscles running along the length of the spine, holding posture through a night of running)
• Transverse Abdominis (a deep core muscle that wraps around the torso like a corset, holding the trunk together over an extreme duration)

FAQ

What’s the difference between this and marathon running? Marathon Running covers the standard 42.195 kilometer distance, while ultramarathon running extends past it, often onto technical trail terrain that asks more of footing and sure-footed control.

Do I need to run the whole thing? No, and trying to is the most common mistake. A planned walk-run strategy, especially on climbs, is the standard approach at these distances.

How long does training for an ultra take? Several months at minimum, and only after a marathon and a comfortable long-run base are already in place.

Why does terrain matter so much for this distance? Many ultras run over technical trail, which is part of why practicing on similar terrain ahead of the event matters.

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Next in this series: back to Marathon Running, the distance this event extends past.