Running Plan Review Higdon Marathon: Intermediate 1
By Hal Higdon's Marathon: The Ultimate Training Guide — Hal Higdon Requires purchase Visit plan website
Plan at a Glance
The major difference between intermediate and novice programs is that you do back-to-back runs on the weekend: a run at marathon pace Saturday and a long run at a slower pace on Sunday. And two 20-milers at peak training.
Our full review of the plan follows. We grade every plan on the same 31-point benchmark, with each measure drawn from peer-reviewed sports-science research and proven coaching best practices.
Workouts
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Our Review
Back-to-back weekend running is what sets this apart from Hal Higdon's beginner plans. On Saturday you run at goal pace, then on Sunday you run long on legs that have not recovered yet. It is the step up for a runner who has already finished a marathon or a few halves and now wants a pace in mind, not just a finish line.
That Sunday long run is the session to respect, and the tiredness in your legs is the point. You hit the marathon's hard miles already depleted, and running long on pre-tired legs rehearses exactly that. The trap is treating Saturday as a throwaway and showing up fresh, which removes the reason to stack the days. Run Saturday honestly at goal effort, then hold an easy, even pace Sunday. By the two 20-mile runs in weeks 13 and 15, your legs will know how to keep going when they would rather stop.
The calendar is the lean half of the package. Marathon: The Ultimate Training Guide carries the rest: how to turn a finish time into a pace, two chapters on injury and recovery, and the rule for a missed run. Read together, the plan and the book deliver more than the grid shows. One real gap survives that reading: strength gets named but never lands on a training day, so the routine is yours to schedule. This is the lighter of the two intermediate builds. It suits a runner with a finish or a few halves behind them who wants a pace goal without the strain of a 50-mile peak. Never held five running days or run past 13 miles? Start with a novice plan. Want the heavier mileage of three 20-milers, take Intermediate 2; for faster gears off track work, his advanced programs add the speed this one skips.
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Structure
Does the plan build you up smartly?
The eighteen weeks move in two-up, one-back waves, mileage and the long run rising for a fortnight before a lighter week resets your legs. This is the leaner of Higdon's two intermediate builds. You meet 20 miles twice, in weeks 13 and 15, the peak landing three weeks out so you reach the line rested. A three-week wind-down closes it. The shape stays legible from the first week to the last.
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Prevention
Does the plan protect you from injury?
A peak near 44 miles and a step-back week every third week hold the workload to something an intermediate runner can absorb without the load stacking. The book backs that safe curve with two full injury chapters and overtraining warning signs, plus 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 aimed at Tuesdays without ever being written onto a day.
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Flexibility
What happens when you miss a day?
Every day on the grid is fixed, but the book does the bending the calendar does not. Higdon names the long run as the session to protect and lets you slide days around so long as the week's shape holds. He also gives a plain rule for a missed run: never go two days without running. The catch is that all of it lives in his pages, not next to the calendar, so the grid alone still reads as rigid.
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Readiness
Will the plan deliver race-day fitness?
Readiness is where this build is sharpest. Two trips to 20 miles and Saturday runs locked to your exact goal pace put the marathon's demands into your legs before race day. A week-9 half marathon hands you a live pacing-and-fueling test on a real course. Everything aims at the finish, and the three-week taper is timed to leave you fresh for it.
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Variety
Are the workouts varied enough?
Three running shapes carry the week: short easy days, one Saturday run at goal pace, and the long weekend run. That covers a steady finish, but the menu is narrow. Nothing here runs faster than goal pace, so if you want sharper gears for the race, this plan does not build them.
Plan Strengths
- Run Saturday at goal pace, then meet Sunday's long run on legs that have not recovered, rehearsing the exact bind the marathon saves for its last miles.
- Twice in the build, weeks 13 and 15, you cover the full 20 miles, enough to make race-day distance familiar without the heavier load of three trips to 20.
- Every third week eases off, letting your legs take in the climb before the next push rather than wearing you down through the build.
- Week 9 drops you into a real half marathon, clock and crowd included, where you can practice race-day pacing and fueling under pressure.
- Nine Saturday pace runs stack goal effort into your legs over the build, so race pace arrives as a rhythm you already know rather than a stranger.
- Each day reads as one distance or a single pace label, so the week never needs decoding before you lace up.
Weaknesses & gaps
- Strength is aimed at Tuesdays in the book but never lands on the calendar, so the moves, the count, and the timing are all left for you to settle.
- Coming out of a lighter week, the next can jump 30 percent or more as the long run gains several miles in a single step.
- Goal pace gets a name but never a number in seconds per mile, and that conversion lives in Higdon's book rather than beside the Saturday pace run.
- Fall a run behind and nothing on the page tells you what to skip or how to recover the distance.
- No run climbs past goal pace, so a runner hunting a sharp finish finds no faster work here to build with.
- Warming up before the harder Saturday efforts is on you, because not one run on the page writes a warm-up in.
What this plan does not give you
The Saturday runs name marathon pace but never give you a number. Before week 1 you will need Higdon's book to turn a target finish time into seconds per mile. Strength is the next gap. He points you to Tuesdays but never writes a session onto the grid, so a short routine twice a week is yours to build and time. Each easy day also skips how hard to go; easy simply means you can still talk while running. The last gap is a missed run, which the page never addresses. Rather than cram two days together, skip the run, and never pile the Sunday long run onto already-tired legs to make it up.
What the science supports
Long runs are essential for marathon
The long run is the heart of this plan. It grows steadily from 8 miles in week 1 to two separate 20-mile runs in weeks 13 and 15. Long, slow runs build the staying power a marathon needs, and nothing shorter or faster replaces them. By teaching your legs to keep going for hours, these runs prepare you for the back half of race day better than any other session here.
Toresdahl et al. 2021; Jones & Kirby 2025; Casado et al. 2019
Easy aerobic volume is the foundation
Most of your running here is easy, with three short relaxed runs every week alongside the long run. Easy miles are the wide base that everything else rests on. They build your engine without wearing you down, so you can keep training week after week. This plan keeps the hard running to a single goal-pace day, which is the right balance for steady marathon progress.
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 final 20-mile run in week 15, the mileage drops week by week into race day. This easing off, called a taper, lets your body soak up all the earlier work and show up rested. Cutting back before a race reliably helps you run better, and arriving fresh matters far more than squeezing in extra miles late.
Keep easy days easy, hard days hard
The week has a clear rhythm of harder and gentler days. Saturday's goal-pace run and Sunday's long run carry the load, while the short midweek runs stay easy and a Monday cross-training day gives the legs a change. Keeping easy days truly easy is what makes the hard days count. The plan spaces its demanding weekend so the rest of the week can stay light.
Stöggl & Sperlich 2014; Casado et al. 2022; Kenneally et al. 2017
Half-marathon experience protects marathoners
Week 9 places a half marathon right in 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 1 good for beginners?
- No. Higdon Marathon: Intermediate 1 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 1 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 1 include a taper?
- Yes, the plan includes a taper into race week.
- What is the rubric grade for Higdon Marathon: Intermediate 1?
- Higdon Marathon: Intermediate 1 grades C on the Buena Vida rubric.