Running Plan Review Higdon Marathon: Intermediate 2
By Hal Higdon's Marathon: The Ultimate Training Guide — Hal Higdon Requires purchase Visit plan website
Plan at a Glance
More mileage. That's the biggest difference between Intermediate 2 and Intermediate 1. Three 20-milers. This is definitely an endurance-based program.
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You have crossed a marathon line, or run a stack of halves, and you want the distance to feel routine rather than daunting. On Hal Higdon's intermediate ladder this is the bigger-mileage rung. One number tells you its character: three 20-mile runs, where most plans at this level give you one or two. You get endurance first here, with no track work and one weekly run at goal pace.
Your week 15 long run is the session to respect, and the reason to pick this over the lighter intermediate build. You meet 20 miles once, then again, then a third time, until the distance is a rehearsed habit. By race morning your legs are doing something they have done three times. The trap is easing off once the distance stops scaring you. Run all three at the same easy, conversational pace. Hit that third one and you arrive deep in endurance and fully rested, three weeks out.
Much of the coaching sits in the book, not the calendar. Marathon: The Ultimate Training Guide carries two chapters on injury and recovery, overtraining warning signs, and the way to turn a finish time into a pace. Read with the grid, the plan delivers well past what the bare calendar shows. The gaps that survive that reading are real. Strength gets named but never lands on a training day, the missed-run rule is the vague never-two-days-without-running, and you still supply the pace number yourself. This fits an intermediate runner with a marathon or several halves behind them, running five or six days most weeks, who wants endurance banked over a sharp time. If you have never held five running days or run past 13 miles, start with a novice plan. If you want faster gears for a time goal, his advanced programs add the speedwork this one leaves out.
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Structure
Does the plan build you up smartly?
The eighteen weeks climb in clear waves: mileage and the long run build for two weeks, then drop back, again and again. Three 20-mile runs land in weeks 11, 13, and 15, the last one three weeks out, so your legs reach the line rested. A three-week wind-down closes it out. You always know where you are in the build.
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Prevention
Does the plan protect you from injury?
Carrying three 20-milers and a 50-mile peak demands a careful load curve, and the every-third-week cutback delivers one, so the bigger volume lands without grinding your legs down. The book backs that curve with two full injury chapters, overtraining warning signs, and its light-weight, high-rep strength habits. What stays off the grid is the doing of it: no run carries a warm-up, and strength is pointed at Tuesdays but never written onto a day.
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Flexibility
What happens when you miss a day?
The calendar itself is a fixed grid, but the book carries the give. It tells you to keep the long run and pace run when a week falls apart, never to go two days without running, and how to move days around. That latitude lifts the plan off rigid. It still bites here, since a skipped long run can collide with the next 20-miler, and none of the catch-up guidance is printed beside the calendar.
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Readiness
Will the plan deliver race-day fitness?
This is the plan's strongest side. The long runs build to three full 20-milers, and the Saturday runs rehearse your exact goal pace. A half marathon in week 9 gives you a real dress rehearsal for pacing and fueling. Everything points at the marathon, and the three-week wind-down is timed to leave you fresh.
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Variety
Are the workouts varied enough?
You get three shapes of running: short easy days, a weekly run at goal pace, and the weekend long run. That is enough to carry you to a steady finish, but it is a narrow menu. There is no speed work of any kind, so faster racing gears are not something this plan builds.
Plan Strengths
- By weeks 11, 13, and 15 you reach three separate 20-mile runs, so the full distance becomes a rehearsed habit instead of a one-time gamble on race day.
- Peak weeks touch about 50 miles, built up gradually through the waves, which leaves you arriving at the start with deep endurance in the legs.
- A lighter step-back week drops in every third week, letting your legs absorb the climb before the next push rather than grinding you down.
- Week 9 hands you a real dress rehearsal: a half marathon on a true course with a clock and other runners, where you practice race-day pacing and fueling.
- On the three peak weekends, a goal-pace Saturday lands the night before a 20-mile Sunday, so you start those longest runs already pre-fatigued, the way the marathon's closing miles feel.
- One distance or a single pace label per day is all you read, so the week never needs decoding.
Weaknesses & gaps
- The sharpest spikes come when the long run snaps back to 20 miles after an easier week, pushing several weekly totals up by roughly half over the week before.
- Strength is pointed at Tuesdays but never written onto the calendar, so the routine, the moves, and the timing are all yours to figure out.
- Your goal pace gets named but never given in seconds per mile, and that conversion sits in Higdon's book rather than beside the Saturday pace run.
- Miss a run and the grid stays silent; the book's only rule is the vague never-go-two-days-without-running, with no quantified way to recover the distance.
- No run ever goes faster than goal pace, so a runner chasing a sharp time has nothing here to build speed with.
- Easing into the harder Saturday efforts is left to you, since not a single run on the page includes a warm-up.
What this plan does not give you
With three 20-milers and a 50-mile peak, the biggest gap here is what happens when you fall behind. The grid prints no catch-up rule, and the book's guidance is only the vague never-go-two-days-without-running. On a plan this heavy that matters most: never pile a skipped long run onto the next already-long Sunday. Shorten it or let it go, and keep the two-up, one-down wave intact. Pace is the next blank. Marathon is named on the Saturday runs but never as a number, so reach for Higdon's book to convert your goal finish into a per-mile target before week 1. Strength is pointed at Tuesdays but never written onto the grid, so a short routine twice a week is yours to build and time. And easy days never say how hard to go; treat easy as a pace you can still talk through.
What the science supports
Long runs are essential for marathon
The long run is the engine of this plan, and it goes further than most. It grows from 10 miles in week 1 to three separate 20-mile runs in weeks 11, 13, and 15. Long, slow runs build the staying power a marathon needs, and nothing shorter or faster replaces them. Three trips to 20 miles teach your legs to keep going for hours, which is exactly what the back half of race day demands.
Toresdahl et al. 2021; Jones & Kirby 2025; Casado et al. 2019
Higher chronic load is protective
Peak weeks reach about 50 miles, but you climb there slowly over many weeks rather than all at once. A higher running load, when built up gradually like this, tends to lower injury risk instead of raising it, because the body has time to adapt. The wave pattern, two weeks up and one week easier, is what makes the bigger mileage safe to carry all the way to race day.
Easy aerobic volume is the foundation
Most of your running here is easy, with three short relaxed runs every week alongside the long one. Easy miles are the wide base everything else rests on. They build your engine without wearing you down, so you can train week after week without breaking. This plan keeps the harder running to a single goal-pace day, which is the right balance for steady marathon progress on high mileage.
Haugen et al. 2022; Casado et al. 2022; Tønnessen et al. 2014
Tapering improves race performance by 2-6%
The last three weeks wind down on purpose. After the third 20-mile run in week 15, the mileage drops step by step into race day. This easing off, called a taper, lets your body soak up all the earlier work and arrive rested. Cutting back before a race reliably helps you run better, and showing up fresh matters far more than squeezing in extra miles late in the build.
Half-marathon experience protects marathoners
Week 9 drops a half marathon right into the middle of the build. Running a real race before your marathon, with other runners and a clock, gives you a safe place to practice pacing and fueling under pressure. Runners who race a half before a marathon tend to handle race day better. Treat this one as a rehearsal: hold back early, and learn what your stomach and legs do late.
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Frequently asked questions
- Is Higdon Marathon: Intermediate 2 good for beginners?
- No. Higdon Marathon: Intermediate 2 is built for intermediate-level runners. A true beginner should start with a lower-mileage plan.
- How many days per week does Higdon Marathon: Intermediate 2 require?
- The plan runs on a schedule of multiple weekly runs. See the at-a-glance strip for the exact count.
- Does Higdon Marathon: Intermediate 2 include a taper?
- Yes, the plan includes a taper into race week.
- What is the rubric grade for Higdon Marathon: Intermediate 2?
- Higdon Marathon: Intermediate 2 grades C on the Buena Vida rubric.