50 Mile Training Plan: From a 50K or a Break¶
A 50 mile plan looks like a 50K plan with longer weekends. More time on feet. Back to back long runs. Practice eating while you move. A taper before race day.
The size of the jump depends on where your weekly mileage is today, not on how many races you have finished. That is the part most plans skip. This post is for two runners. One has a 50K done and wants the next step. The other is coming back to 50 miles after a year of shorter races, or a year of not much at all. Same plan shape, different starting line.
Below: how the plan works, a 16-week sketch you can print, and answers to the three questions runners ask most.
Start from your own weekly mileage¶
Before any plan, look at the last six to eight weeks of your own running. Not your best week. The weeks you actually did.
- If you have been running steadily and your longest run is around three hours, you can start near week 1 of the sketch below.
- If you are coming back from a break, or your longest run is closer to 90 minutes, spend a few weeks building up to that first. Ultra base building covers how. Starting a 16-week plan from too low is how a plan turns into a catch-up job.
- If you have run a 50K, you already know the shape of a long day. You do not need to be told you belong here.
A plan is a place to start from. If a week goes sideways, you repeat it. Nobody is behind.
What changes between a 50K plan and a 50 mile plan¶
Four things get bigger. Nothing new gets added.
- The long run gets longer in time, not just miles. Think in hours. A four hour day on hilly trail is a bigger day than a four hour day on flat road, and it counts for more.
- Back to back weekends become the main session. A long Saturday, then a shorter Sunday on tired legs. The second day is where you practice moving when you do not feel like it. More in back to back long runs.
- Eating becomes part of the training. You will be out for ten hours or more. Practice the food and the pace you plan to eat at on the long days. See the ultra fueling plan.
- The taper gets a real length. Three weeks is common. Cut the volume, keep some easy running.
The late miles of a 50 are their own thing, covered in what changes after mile 35. This post is the plan around them.
A 16-week sketch¶
This is a sketch, not a prescription. The weekend hours are mine, built from the pattern that published 50 mile plans share: a long Saturday, a shorter Sunday, a lighter week every fourth week, and a taper. Move the numbers to fit your life. Weekdays are easy running, a day or two off, and some strength work.
Times are time on feet, including walking and hiking. Power hiking counts.
| Week | Saturday | Sunday | Note |
|---|---|---|---|
| 1 | 2:30 | 1:00 | Start here if three hours is your longest |
| 2 | 2:45 | 1:00 | |
| 3 | 3:00 | 1:15 | |
| 4 | 2:00 | off | Lighter week |
| 5 | 3:30 | 1:30 | |
| 6 | 3:45 | 1:30 | |
| 7 | 4:00 | 1:45 | |
| 8 | 2:30 | off | Lighter week |
| 9 | 4:30 | 2:00 | |
| 10 | 5:00 | 2:00 | |
| 11 | 5:30 | 2:00 | |
| 12 | 3:00 | off | Lighter week |
| 13 | 6:00 | 2:30 | Biggest weekend. Race food, race shoes, race pack |
| 14 | 4:00 | 1:30 | Taper starts |
| 15 | 2:30 | 1:00 | |
| 16 | 0:30 to 0:45 easy | off | Race week |
Print it. Pencil in your own dates. Write the race date in week 16.
Two rules for the Sunday run. Keep it easy enough that you could talk. And skip it if something hurts in a way that is new. If a pain sticks around, that is a conversation for a doctor or physical therapist, not for a training plan.
How do I go from a 50K to a 50 mile race?¶
You change the weekends, not the whole week. If your 50K plan peaked with a long run near four hours, the sketch above takes you from there to six hours over about twelve weeks, with a lighter week every fourth week.
You do not need to run 50 miles in training. One published 24 week plan from Sunrise Running Company has a longest run of 31 miles, and it pairs every Saturday with a Sunday run from week 1 (source). Its Saturday runs grow from 14 to 31 miles and its Sundays from 6 to 12. Your plan can be shorter or longer. The shape is the same.
If your first 50K felt rough in the last hour, say so in your plan. Add one more day of walking practice on the long runs. Walking uphill on purpose is a skill, and it is worth practicing.
Is there a free 50 mile training plan?¶
Yes. The sketch on this page is free. Many coaches and running stores publish plans, and they are worth reading once you have the shape in your head. The Sunrise plan lists a four week taper and a peak week of 72 miles, which shows how far plans can differ and still work.
The difference between a plan on a page and a plan built for you is your own history. A page does not know that your last six weeks were 22 miles, 31 miles, 18 miles, and then a cold. NavRun's AI training plans take your Strava history, your target weekly mileage and your race date, and build a weekly plan that updates from the runs you complete. If you miss a Saturday, next week is built from what you did, not from what was supposed to happen.
How long are the long runs in a 50 mile plan?¶
In the sketch, Saturday peaks at six hours. The Sunrise plan peaks at 31 miles. Plans differ, so treat both as a range, not a rule. Hillier races and slower days make more sense counted in hours.
What stays the same is the pairing. A big Saturday, then a smaller Sunday. In the sketch above, the biggest weekend is week 13, about three weeks before race day, and it is the dress rehearsal. Wear what you will wear. Eat what you will eat. Take the pack.
The longest run is not a test. If it goes badly, that is information, and you have three weeks to use it. For more on time on feet over mileage, see time on feet vs mileage.
The taper¶
Three weeks out, volume falls. Weeks 14 to 16 above go from a four hour Saturday to a short shakeout. Keep a little easy running in. The point is to arrive rested, not out of practice. The ultra taper guide has more.
The taper feels strange. You will feel restless and a little heavy. That is common, and it passes by race morning.
What to bring to the plan¶
- Your last six to eight weeks of running, honestly.
- A race date, even a rough one.
- One Saturday per week that is protected.
- One person who knows your race date and will ask how it went.
That last one matters more than any table.
Build your own¶
Whether you have a 50K behind you or you are coming back after a break, you do not have to start from a blank page.
Build a plan toward your 50 mile date
Start free. navrun.app