Weekly mileage for marathon training is one of the most common questions I hear as a running coach. How many miles should you be running each week? The answer depends on your experience level, goal time, and training phase.
The answer isn’t one-size-fits-all—it depends on several factors, including your experience level, your goals, your available time, and how well your body handles volume.
If you’ve trained for a race before, especially a half or full marathon, you probably remember that the final weeks of your plan cut back your mileage. That’s the taper period—designed to help you recover and show up fresh on race day.
But before you taper, building up to the right weekly mileage is key to developing the endurance, strength, and confidence you’ll need for 26.2 miles.
The concept of “ideal” weekly mileage varies, but understanding the general ranges and what influences them can help you train more effectively and avoid burnout or injury.
Let’s break down what weekly mileage typically looks like for marathon training and what factors can help you determine the right range for you.
The Honest Truth: Weekly Mileage Is A Dose, And The Dose-Response Curve Is Not Linear
Most “how many miles a week for a marathon” answers reduce to copying the number at the top of week 12 on a generic marathon training plan. The exercise-physiology literature has a sharper framing: mileage is a training dose, and like any dose it has a performance curve that bends and an injury curve that rises. The real decision is not “more vs less” but where on those two curves you want to sit, and which of the three variables — average weekly miles, long-run length, or intensity distribution — is actually doing the work. Below is what the controlled studies and the elite-training surveys show.
Performance Returns Flatten Above 50–70 Miles Per Week For Recreational Marathoners
The classic dose-response work of Hagan and Foster found that weekly mileage, long-run length, and average training pace together explain 50–70% of marathon-time variance in recreational marathoners — but the curve bends sharply around the 50–70 mi/wk mark, with each additional 10 mi/wk above that adding far less than the first 10 above 30.1Hagan RD, Smith ML, Gettman LR. Marathon performance in relation to maximal aerobic power and training indices. Medicine & Science in Sports & Exercise. 1981;13(3):185–189.Foster C, Daines E, Hector L, Snyder AC, Welsh R. Athletic performance in relation to training load. Wisconsin Medical Journal. 1996;95(6):370–374. Follow-up work on sub-elite and elite marathoners (Billat’s survey of top-class performers) shows the same pattern at a higher absolute scale: elites average 120–160 miles per week, but they accrue that volume over a decade of progression, and the marginal benefit of the 130th vs 120th mile is measured in seconds, not minutes.2Billat VL, Demarle A, Slawinski J, Paiva M, Koralsztein JP. Physical and training characteristics of top-class marathon runners. Medicine & Science in Sports & Exercise. 2001;33(12):2089–2097.Berg K. Endurance training and performance in runners. Sports Medicine. 2003;33(1):59–73. For a recreational marathoner targeting a sub-4:00 or sub-3:30, the literature converges on 35–55 mi/wk as the range where most of the physiological return lives; above 60–70 the gain per mile collapses unless intensity distribution or long-run composition changes.3Fokkema T, de Vos RJ, Visser E, Krastman P, Bierma-Zeinstra SMA, van Middelkoop M. Enhanced injury prevention programme for recreational runners (the INSPIRE trial): a cluster randomised controlled trial. British Journal of Sports Medicine. 2019;53(20):1261–1268.
Injury Incidence Rises Near-Linearly With Volume — Without A Protective Ceiling
The mileage-injury relationship is the most important piece of the decision and the least-discussed on most training-plan pages. The Videbæk systematic review of running-related injury incidence pooled 13 studies covering over 38,000 runners and landed on an injury rate of roughly 7.7 injuries per 1000 hours of running for recreational runners and 17.8 per 1000 hours for novice runners, with rate climbing as weekly volume climbs.4Videbæk S, Bueno AM, Nielsen RO, Rasmussen S. Incidence of running-related injuries per 1000 h of running in different types of runners: a systematic review and meta-analysis. Sports Medicine. 2015;45(7):1017–1026. Nielsen’s 930-runner prospective cohort showed that runners whose weekly volume jumped more than 30% over two weeks had a 1.6× higher injury rate than runners who increased gradually — the evidence base for the often-quoted “10% rule” and a more defensible rule than the 10% number itself.5Nielsen RO, Parner ET, Nohr EA, Sorensen H, Lind M, Rasmussen S. Excessive progression in weekly running distance and risk of running-related injuries: an association which varies according to type of injury. Journal of Orthopaedic & Sports Physical Therapy. 2014;44(10):739–747. Kluitenberg’s meta-analysis of 17 cohorts of novice runners puts first-year injury probability at 20–30% even with cautious programs, and the single strongest modifiable predictor in their model was weekly training volume.6Kluitenberg B, van Middelkoop M, Diercks R, van der Worp H. What are the differences in injury proportions between different populations of runners? A systematic review and meta-analysis. Sports Medicine. 2015;45(8):1143–1161. Translation: every extra 10 mi/wk past your current trained base adds real injury probability, and that probability does not plateau the way performance gain does.
The Long Run And Intensity Distribution Often Matter More Than Weekly Total
When Hagan’s regression equations are re-run with long-run length as a separate variable from total weekly miles, the long run absorbs a large share of the predictive weight on its own: a 20–22 mile long run with a 35 mi/wk average outperforms a 50 mi/wk week that tops out at 13 miles in marathon-time prediction models.7Hagan RD, Smith ML, Gettman LR. Marathon performance in relation to maximal aerobic power and training indices. Medicine & Science in Sports & Exercise. 1981;13(3):185–189.Slovic P. Empirical study of training and performance in the marathon. Research Quarterly. 1977;48(4):769–777. The other lever is intensity distribution. Seiler’s synthesis of elite endurance training across sports lands on a roughly 80/20 split — 80% of sessions at low intensity below the first lactate threshold, 20% at or above lactate threshold — as the pattern that recurs from elite rowers to marathoners, regardless of total volume.8Seiler S. What is best practice for training intensity and duration distribution in endurance athletes? International Journal of Sports Physiology and Performance. 2010;5(3):276–291.Stellingwerff T. Contemporary nutrition approaches to optimize elite marathon performance. International Journal of Sports Physiology and Performance. 2013;8(5):573–578. The practical consequence: a runner on 40 mi/wk with one true long run and one quality session per week will out-train a runner on 55 mi/wk of undifferentiated “moderate” pace, both on race-day performance and on injury risk.9Esteve-Lanao J, Foster C, Seiler S, Lucia A. Impact of training intensity distribution on performance in endurance athletes. Journal of Strength and Conditioning Research. 2007;21(3):943–949.
Counter-Argument: When Chasing More Weekly Miles Is Exactly The Right Move
The “flat above 60” logic does not apply to everyone. Four situations where the right answer is genuinely more miles. First, the true beginner on 15–25 mi/wk — every extra 5 mi/wk in that band is steeply productive because the plasma-volume, capillary, and mitochondrial adaptations are all nowhere near saturation. Second, the experienced runner targeting sub-3:00 or Boston-qualifying times where the last few minutes of improvement only come from sustained volume at 55–80 mi/wk across a full training block — Billat’s sub-elite survey shows this clearly.10Billat VL, Demarle A, Slawinski J, Paiva M, Koralsztein JP. Physical and training characteristics of top-class marathon runners. Medicine & Science in Sports & Exercise. 2001;33(12):2089–2097. Third, marathoners whose current plateau comes from insufficient long-run depth rather than intensity — adding a second mid-week mid-long run is a mileage increase that moves performance without needing more quality. Fourth, ultra-marathon or back-to-back-race training, where durability itself is the target and volume is the only variable that builds it.11Millet GY, Hoffman MD, Morin JB. Sacrificing economy to improve running performance: a reality in the ultramarathon? Journal of Applied Physiology. 2012;113(3):507–509. For everyone else — the recreational first-timer, the time-constrained parent, the runner rebuilding from injury — the physiology is saying the same thing: the question is not “more miles” but “the right miles”, and the curve bends earlier than marathon culture admits.
How Many Miles Should I Run Per Week Training for a Marathon?
In most training plans, I often see a lot of focus placed on the long run, which makes sense. It’s a critical component of preparing your body and mind for race day.
Most marathon plans for recreational runners build toward a peak long run of around 20 miles, and there’s general consensus among coaches that this is a solid benchmark for many athletes.
However, far less attention is given to another key aspect of training: your total weekly mileage. In other words, beyond the long run, how many miles per week should you actually be running to prepare for a marathon effectively?
The answer is, it depends. While 20 miles may be a common long-run target, weekly mileage is much more individualized.
Elite and experienced runners may go well beyond 20 miles in a single session, and plans like the Hansons Marathon Method cap long runs at 16–18 miles due to their higher overall volume and back-to-back quality sessions.
When it comes to total weekly mileage, there’s no one-size-fits-all number. Runners may log anywhere from 35 to 140+ miles per week, depending on their experience, goals, available time, and ability to recover.
That’s a huge range, so instead of chasing a number that worked for someone else, it’s essential to understand the factors that influence your optimal weekly mileage.
Here are some general guidelines that you can take as you go through the factors and adjust as necessary:
- Beginners training for their first marathon often run in the neighborhood of 35 to 40 miles per week
- Experienced marathon runners who are looking to set a PR or who have been training for many years may run closer to 40 to 60 miles per week.
- Competitive and sub-elite marathon runners typically have an average of 70 to 90 miles per week.
- Professional and elite runners are often well above 100 miles per week, training for a marathon (110-140 miles per week).
Let’s break down our aforementioned factors so you can build a plan that’s smart, sustainable, and tailored to you.
Related: Marathon Time Calculator – Predict Your Marathon Finish Time
What Really Determines How Many Miles You Should Run Each Week
Consider the following factors when trying to decide how many miles to run per week for marathon prep:
#1: Experience Level
Arguably, the single most significant factor that will affect your target average weekly mileage for marathon training is your experience level.
Beginners will almost certainly have lower weekly miles for marathon training than experienced and competitive athletes.
#2: Your Marathon Goal
Your goal for the marathon will also affect the recommended number of miles per week you should be striving for.
If you are just looking to finish the race, you should be able to get away with lower weekly mileage, but if you are looking to set a big PR, qualify for the Boston Marathon, place in your age group, or break the tape, your goal mileage for a marathon training should be higher.
#3: Your Injury History and Risk
If you are prone to injuries, you may be best served by reducing your weekly running mileage and supplementing with low-impact cross-training activities, such as using elliptical machines, deep water running, or indoor cycling.
In this case, you may even want to consider keeping track of your marathon training in minutes per week vs. miles per week, since it will be easier to have a meaningful gauge of your weekly marathon training volume if all forms of cardio exercise are added in the same format.
#4: Training Plan Intensity
One of the most important factors to consider is the quality of the miles you are running on the training plan. Not all miles are equal in terms of intensity and effectiveness.
There has long been a debate about whether you can actually run “junk miles “ or if all miles are helpful.
Wherever you stand on the debate, what is clear is that speed workouts, threshold runs, long run mileage, hill workouts, etc., take more of a toll on the body than an easy jog or recovery run. Moreover, how you structure the intensity in a training plan for a marathon also matters.
Overall, a marathon training plan that includes just base mileage with few structured workouts or high-intensity interval sessions may have higher weekly mileage than a marathon training plan with lots of high-intensity workouts.
#5: Your Age
If you are a senior or older adult, you may need to consider lowering your average miles per week to avoid getting injured and to support recovery. The body tends to take longer to recover as we age.
As you can see, many factors can affect the optimal number of miles per week for marathon training plans, so the range for overall marathon weekly mileage is significantly broader and up for more debate than the average peak marathon long run distance.
To help you get a head start, check out some of our free online marathon training plans:
