20 Week Advanced Marathon Training Plan

Our 20 week advanced marathon training plan is designed for experienced runners who are really looking to push their limits; whether it’s a new PB or another ambitious target, this training program is intense from week 1 and rachets things up from there.   

Note that it starts with a 10 mile long run, and includes 3 x 20 mile long runs.

20 Week Advanced Marathon Training Plan

Who Is It For?:

Runners who have a good existing running base and want to really push their limits in their marathon effort.  Perhaps you’ve already run a few marathons and are looking to set a new PB.   You should already be capable of training several times per week, and run 10 miles continuously. 

How Long?: 

Five months // 20 weeks.  

Description: 

This plan starts off with a good level of intensity, and continually rachets it up. 

Training Runs are there to add to your mileage and get time on your feet – both essential in any marathon training schedule.  These should be done at close-to your target marathon pace; they should be sustainable but requiring some effort.

Pace Runs should be done at your intended marathon pace.  If you’re not training for a particular marathon finishing time, you may wish to consider one of the intermediate training plans instead.

Cross Training is there to compliment your run training, and give your legs a break.   Swimming is always a good option that helps build your cardio; weights are also good as they build core strength, but keep the load light.

Intervals are included so you can work on your speed; the method included in this training plan is essentially that of Yasso 800s.   Run for 800m at a high-intensity level, where you are uncomfortable, and then bring it right down to a comfortable job for 800m.   Repeat as many times as the plan calls for.

Tempo Runs also build speed; you should start off slow and easy (first 10 mins), then gradually build speed until you are pushing yourself to marathon pace, or to the point of discomfort; then slow down back to an easy run for the last 5-10 minutes.

Long runs should be performed at a slow, conversational pace – don’t worry about speed when doing your long runs, focus on getting the hours on your feet in.   If you try and do your long runs at marathon pace, you’ll end up overtraining and getting fatigued.   If in doubt, run the long runs at 60 – 90 seconds per mile slower than your planned marathon pace.  Note that the training plan includes 3 x 20 mile runs to really solidify your base.   Anything over 20 miles really just increases the risk of burnout.

Download The Training Plan Here

Enter your email, and I’ll send you this free training plan now, in PDF and Google Sheets formats (completely customizable), in both miles and kilometers.  

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20 Week Advanced Marathon Training Plan

Check Out The Premium Version of The Advanced 20 Week Marathon Training Plan . . .

We’ve teamed with TrainingPeaks to offer a premium version of the Advanced 20 Week Marathon Training Plan:

Access the plan via the TrainingPeaks website and app, track your workouts in real-time against the plan, and get performance data analysis on your progress.

Check out the premium 20 week advanced marathon training plan here!

20 Week Advanced Marathon Training Plan 1
trainingpeaks training plan

The most comprehensive plan you will find

Rated 5 out of 5
October 28, 2019 7:05 pm

I had run a couple of half marathons and was in reasonable shape coming into the plan and it was a good rise in intensity throughout. You need to want to do an event like this – I was getting up at 3am to get my long run in before kids weekend sport etc and this was hard. When you combine the plan with the online community through the Marathon Handbook FB page and website, you get complete support. Have used this plan with great success and now looking at upping the pace in the marathon space… GREAT JOB!

Rob McCaw

10 / 10 - Got my through my race!

Rated 5 out of 5
January 17, 2023 4:51 am

Great plan

Jon

This plan hit so well!

Rated 4 out of 5
December 28, 2022 6:12 am

Well, I have been marathoning for almost 15 years and wanted to test something new out. I tried this plan because it looked completely different than any training method before. It didn’t make sense how the running peaked, and I got to the start line exhausted and sick, clearly under rested. The marathon had actually gone pretty smoothly until mile 17, when my ankle rolled and my ACL ripped. Had to quit the race and was upset with this training plan. However, free IS free. 6/10. Would not recommend

Sven

Amazing programme!!

Rated 5 out of 5
November 15, 2022 11:16 am

These running plans are AMAZING. I used it for 2 half marathons and I was so surprised at how I gained fitness, even though I was ill for 2 weeks and sustained a knee injury!

I completed the half marathon in 1h37 min 😃🤗

Thanx again team!

Miranda (51 yrs old 🥰)

first marathon

Rated 5 out of 5
October 27, 2022 6:16 am

and it worked a charm!

Marcelina Ziemnicki

20 Week Advanced Marathon Training Plan 2
20 Week Advanced Marathon Training Plan 3

Proven Training Plans by a UESCA-Certified Running Coach 

Every one of our training plans has been developed by Thomas Watson, a UESCA-certified running coach.

Thomas is also a podium-finishing ultra-marathon runner and has dozens of marathons under his belt.

Each training plan has been road-tested by hundreds of runners, refined and improved, and is free to download and customize to suit your needs!