What pace do you need for a 50K ultra marathon?

A 6 hour 50K requires an average pace of about 11:35 per mile or 7:12 per kilometre, with all aid station time included. A 7 hour 50K requires about 13:31 per mile, while an 8 hour 50K requires about 15:27 per mile. Trail terrain, climbing, heat, mud, snow, and aid station stops can all change the real effort.

What pace do you need for a 50 mile ultra marathon?

A 10 hour 50 mile ultra requires an average pace of 12:00 per mile. A 12 hour finish requires 14:24 per mile, and a 14 hour finish requires 16:48 per mile. These paces include walking, aid station time, and slow sections, so your actual running pace will usually be faster than the final average pace.

What pace do you need for a 100 mile ultra marathon?

A 24 hour 100 mile finish requires an average pace of 14:24 per mile. A 30 hour finish requires 18:00 per mile, and a 36 hour finish requires 21:36 per mile. These numbers include walking, eating, shoe changes, bathroom stops, and night miles.

Should you use average pace for a trail ultra?

Average pace is useful for checking cut off times and rough goals, but effort matters more on trail ultras. Use pace on flat runnable sections, hike steep climbs early, run easy descents when your legs allow, and compare your plan to the course profile rather than a flat road pace chart.

How much slower is ultra marathon pace than marathon pace?

For a flat 50K, many runners average 30 to 90 seconds per mile slower than marathon pace. On trail courses, the difference can be several minutes per mile depending on elevation, footing, weather, and how much time is spent at aid stations. For 50 mile, 100K, and 100 mile races, pace is usually better planned by effort and cut off times than by marathon pace.

Ultra Marathon Pace Chart: 50K, 50 Mile, 100K And 100 Mile Splits

Ultra Marathon Pace Chart: 50K, 50 Mile, 100K and 100 Mile Splits

Ultra marathon pace is not the same as marathon pace. A road marathon rewards steady running. An ultra rewards patience, walking before you have to, eating before you feel empty, and keeping the effort low enough that you can still move well hours later.

Use this ultra marathon pace chart to estimate the average pace you need for a 50K, 50 mile, 100K, or 100 mile race. The charts include all time spent moving and stopped, which means aid stations, bathroom breaks, shoe changes, hill hiking, and late race walking are part of the average.

If you are still deciding which race distance fits you best, start with our ultra marathon distance guide. If you already have a race picked, use the calculator below to build a realistic target pace.

Quick Answer

A 6 hour 50K needs about 11:35 per mile or 7:12 per kilometre.
A 12 hour 50 mile race needs about 14:24 per mile or 8:57 per kilometre.
A 24 hour 100 miler needs about 14:24 per mile or 8:57 per kilometre.
A 30 hour 100 miler needs about 18:00 per mile or 11:11 per kilometre.
Trail pace is effort based. Use the chart for cut offs, then adjust for climbing, terrain, heat, mud, snow, and aid station time.

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Pace Calculator Pace Charts Trail Adjustments Pacing Strategy Example Plans FAQ Last Updated: June 2026

Calculator

Ultra Marathon Pace Calculator

Enter your distance, goal time, and expected aid station time. The result shows average pace and the moving pace you need between stops.

Race distance

Goal hours

Goal minutes

Total stopped time in minutes

Elevation gain in feet, optional

Please enter a valid distance and goal time.

Average pace

11:35/mi

Includes all running, walking, and stopped time.

Moving pace

10:56/mi

Approximate pace needed while moving after planned stops.

Halfway checkpoint

2:54 to 3:00

A safer first half window on an evenly balanced course.

Trail caution

Moderate climbing

Use effort on hills. The chart is not a promise on technical terrain.

Reference Charts

Ultra Marathon Pace Charts by Distance

These pace charts show the average pace needed to hit common finish times. They include everything. If your 50K goal is 6 hours and you spend 20 minutes stopped, your moving pace needs to be faster than 11:35 per mile.

50K Ultra Marathon Pace Chart

Finish time	Average pace per mile	Average pace per km	Halfway time
4:30	8:41/mi	5:24/km	2:15
5:00	9:39/mi	6:00/km	2:30
5:30	10:37/mi	6:36/km	2:45
6:00	11:35/mi	7:12/km	3:00
6:30	12:33/mi	7:48/km	3:15
7:00	13:31/mi	8:24/km	3:30
7:30	14:29/mi	9:00/km	3:45
8:00	15:27/mi	9:36/km	4:00

50 Mile Ultra Marathon Pace Chart

Finish time	Average pace per mile	Average pace per km	Halfway time
8:00	9:36/mi	5:58/km	4:00
9:00	10:48/mi	6:43/km	4:30
10:00	12:00/mi	7:27/km	5:00
11:00	13:12/mi	8:12/km	5:30
12:00	14:24/mi	8:57/km	6:00
13:00	15:36/mi	9:42/km	6:30
14:00	16:48/mi	10:26/km	7:00
15:00	18:00/mi	11:11/km	7:30
16:00	19:12/mi	11:56/km	8:00

100K Ultra Marathon Pace Chart

Finish time	Average pace per mile	Average pace per km	Halfway time
10:00	9:39/mi	6:00/km	5:00
11:00	10:37/mi	6:36/km	5:30
12:00	11:35/mi	7:12/km	6:00
13:00	12:33/mi	7:48/km	6:30
14:00	13:31/mi	8:24/km	7:00
15:00	14:29/mi	9:00/km	7:30
16:00	15:27/mi	9:36/km	8:00
18:00	17:23/mi	10:48/km	9:00
20:00	19:19/mi	12:00/km	10:00

100 Mile Ultra Marathon Pace Chart

Finish time	Average pace per mile	Average pace per km	Halfway time
20:00	12:00/mi	7:27/km	10:00
22:00	13:12/mi	8:12/km	11:00
24:00	14:24/mi	8:57/km	12:00
26:00	15:36/mi	9:42/km	13:00
28:00	16:48/mi	10:26/km	14:00
30:00	18:00/mi	11:11/km	15:00
32:00	19:12/mi	11:56/km	16:00
34:00	20:24/mi	12:41/km	17:00
36:00	21:36/mi	13:25/km	18:00

Important: A pace chart is not a course prediction. A flat rail trail 50K and a mountain 50K can have the same distance and feel like two different sports. Always compare your goal to the race cut offs, aid station chart, elevation profile, and past results.

Trail Reality Check

How to Adjust Pace for Trails, Hills, and Aid Stations

Road pace is clean. Ultra pace is messy. A runner who can hold 9:00 per mile on a flat road may average 12:00 to 15:00 per mile on a technical trail with climbing, stops, and hiking. That does not mean fitness disappeared. It means the course is doing its job.

Course surface

Gravel, buffed trail, roots, rocks, mud, snow, and sand all change pace. The more technical the footing, the less useful a flat pace goal becomes.

Check the course photos

Elevation gain

Climbing slows you down. Descending can also slow you down if the trail is steep or technical. Power hike early so your heart rate stays controlled.

Use effort on climbs

Aid station time

Five aid stations at 4 minutes each is 20 minutes gone. That can add 30 to 45 seconds per mile to your required moving pace in a 50K.

Plan your stops

Weather and darkness

Heat, cold, wind, rain, and night sections can all slow pace. If your race goes into darkness, practise with your headlamp before race day.

Expect late miles to slow

Fueling note: The International Society of Sports Nutrition position stand recommends 150 to 400 calories per hour during ultra marathon racing, including 30 to 50 grams of carbohydrate per hour from foods and drinks that you tolerate. Many runners can train toward higher carb intakes, but your race plan should start with what your gut can handle.

Race Execution

Ultra Marathon Pacing Strategy

The best ultra pacing plan is boring early and steady late. If the first third feels exciting, you are probably running too hard. If the first third feels almost too easy, you are closer to the right effort.

Do this

Start slower than your road race instinct.
Walk steep climbs before your heart rate spikes.
Eat and drink from the first hour.
Use aid stations with a plan.
Check effort more than watch pace on trails.
Save your legs for the final third.

Avoid this

Banking time in the first 10 miles.
Trying to run every hill.
Standing around at every aid station.
Skipping calories because you feel good early.
Comparing trail pace to road marathon pace.
Racing the first half like it is the whole race.

A simple first ultra pacing rule

For a first 50K or 50 mile race, aim to reach halfway feeling controlled, not heroic. On an even course, halfway around 48 to 50 percent of your goal time is a reasonable window. If you arrive much earlier than that, ask whether you are truly comfortable or just borrowing energy from the final miles.

On a course with uneven terrain, ignore perfect splits. If the first half has the big climbs, it may be slower by design. If the second half has more climbing, you need to save more time and more legs for later. The course profile matters more than a neat chart.

Sample Plans

Example Ultra Marathon Pace Plans

6 hour 50K

Average pace is 11:35 per mile. With 20 minutes total stopped, moving pace needs to be about 10:56 per mile. Start closer to easy long run effort, walk climbs, and keep aid stations short.

Good first ultra goal

12 hour 50 miler

Average pace is 14:24 per mile. With 45 minutes stopped, moving pace is about 13:30 per mile. A planned run walk approach is usually smarter than waiting until you are forced to walk.

All day pacing

16 hour 100K

Average pace is 15:27 per mile. With 60 minutes stopped, moving pace is about 14:29 per mile. Practise fueling and night running if your finish may happen after sunset.

Night skills matter

30 hour 100 miler

Average pace is 18:00 per mile. With 2 hours stopped, moving pace is about 16:48 per mile. The goal is steady forward movement, controlled stops, and solving problems before they become race ending.

Finish focused

How This Fits Training

How to Use Your Pace Goal in Training

Do not run every long run at goal ultra pace. Most long runs should still feel easy. Use your goal pace as a check on effort, fueling, and terrain. A trail long run that is much slower than goal pace can still be perfect training if the climbing and footing match your race.

The better training question is not, “Can I hold this exact pace today?” It is, “Can I keep eating, hiking, descending, and moving smoothly at this effort for hours?” For a full training plan framework, read the Ultimate Guide to Ultra Running.

Planning your race?

Use pace with the rest of your ultra plan

Build your pace target around the distance, course profile, cut off times, fueling plan, gear, and training history. A chart helps, but it is only one part of the race plan.

Find an Ultra Marathon →

Common Questions

FAQ

What pace do I need for a 50K ultra marathon?

A 6 hour 50K needs about 11:35 per mile or 7:12 per kilometre. A 7 hour 50K needs about 13:31 per mile. An 8 hour 50K needs about 15:27 per mile. These are average paces with all walking and stopped time included.

What pace do I need for a 50 mile ultra marathon?

A 10 hour 50 mile race needs 12:00 per mile. A 12 hour race needs 14:24 per mile. A 14 hour race needs 16:48 per mile. Your running pace between aid stations will usually need to be faster than the average if you stop for food, gear, or bathroom breaks.

What pace do I need for a 100 mile ultra marathon?

A 24 hour 100 miler needs 14:24 per mile. A 30 hour finish needs 18:00 per mile. A 36 hour finish needs 21:36 per mile. These numbers include everything, including walking, aid stations, night miles, and short stops.

Should I pace an ultra by minutes per mile or effort?

Use both, but effort matters more on trails. Pace is useful on runnable flats and for checking cut offs. Effort is better for climbs, technical descents, heat, mud, snow, and late race fatigue. If your watch pace looks slow on a climb but your breathing is controlled, you are probably doing it right.

How much should I slow down for a trail ultra?

There is no single rule. On a runnable 50K, you might average 30 to 90 seconds per mile slower than road marathon pace. On a technical mountain race, the difference can be several minutes per mile. Check past results from your race and compare them to runners with similar road times.

Is walking part of ultra marathon pacing?

Yes. Walking is a normal part of ultra pacing, especially on climbs and through aid stations. Planned walking early is usually better than forced walking late. Many strong ultra runners hike steep climbs from the start to keep effort under control.

Ultra Marathon Pace Chart: 50K, 50 Mile, 100K and 100 Mile Splits

Ultra Marathon Pace Chart: 50K, 50 Mile, 100K and 100 Mile Splits

Ultra Marathon Pace Calculator