Marathon Training Plan How to Choose Yours

Your marathon training plan should run 12 to 20 weeks, sized to your current weekly mileage and how recently you've raced a half or full marathon — not picked off a generic PDF. Below: how to pick your exact plan length, the right page for your race timeframe, whether you're actually ready to start, and how to handle travel or setbacks mid-build.

Staring down a wall of downloadable PDFs that all promise to get you to the start line ready? Here's the truest thing I can tell you before you pick one: the plan itself matters less than whether its length and structure actually match where you are right now. I've coached runners through a standing-start 20-week build and through a 12-week compression off the back of a fresh half-marathon PB — the plan that works is the one matched to the runner in front of me, not a generic template.

Pick Your Plan Length

Start with this table. It's built on two inputs — your current weekly base mileage and how recently you've raced a half marathon or marathon.

One rule I don't bend on: if you haven't run a half marathon in the last 12 months, you get the extra four weeks regardless of your current mileage. That's not caution for caution's sake — it's the time your body needs to rebuild race-specific fitness before I'll load it with marathon-specific work. For the full decision framework, including a worked example, read how to choose 12, 16, or 20 weeks.

Choose Your Path by Timeframe

If you already know your race date, go straight to the page built for your timeframe:

Before You Start: Readiness and Structure

Two questions trip runners up before they've even opened a plan. First — are you actually ready to start? My benchmark isn't a single long run, it's consistency: comfortably running 6–8 miles, three times a week, for at least three weeks running. If that's not you yet, read check if you're ready to start before you commit to a build. Second — where does strength or cross-training fit? That's answered in full at fitting strength training into your plan.

When the Plan and Real Life Collide

No plan survives contact with a busy life untouched — a work trip lands mid-build, you miss a week to a cold, a niggle flares up. Rather than re-explain all of that here, I've built dedicated pages for each scenario. Travelling or juggling work trips? Read training around travel and work trips. Fallen behind mid-cycle? Start with falling behind on your plan. Coming back from a setback or injury, read can I still run this marathon with a two-week setback or shin splint recovery one month to marathon.

Guest Perspective: An Alternative Program Philosophy

Coaching isn't one-size-fits-all, and it's worth hearing a different voice on marathon programming. Marius Bakken's guest answer takes a more performance-oriented approach than my own — useful if you're chasing a specific time rather than simply finishing. Read an alternative coach's program philosophy.

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