Training Plans · Marathon · Sub-4:00

Sub-4 Hour Marathon Training Plan: The Most Popular Goal Time, Done Right

Sub-4 is the marathon goal more runners chase than any other. It's a 9:09 per mile pace. It's achievable for most committed runners. Here's the realistic plan, the weekly structure, and the mistakes that derail it.

By John Farrell, Founder of Pheidi 8 min read Updated May 2, 2026 Training Plans · Pheidi cluster article

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Sub-4 is the marathon goal more runners chase than any other. It's a 9:09 per mile pace held for 26.2 miles. Achievable for most runners with 16-20 weeks of focused training and a reasonable base. Hard enough that going in unprepared usually ends with a 4:15+ finish and a long second half.

This article covers the plan structure, the weekly mileage, the key workouts, and the pacing strategy that actually gets you to a 3:59. For the broader marathon picture, see the marathon training plan guide.

What Sub-4 Actually Requires

Sub-4 is achievable for the average committed marathoner. Honest prerequisites:

Recent half marathon under 1:55. If you can run a half marathon at about 8:48 per mile, you have the engine for sub-4. (Half PRs in the 1:50-1:55 range are typical for sub-4 marathoners.)
Comfortable with 4 days a week of running. Sub-4 plans typically run 4-5 days a week.
30-40 mile base. You don't need 60+ mpw for sub-4. You do need to be able to run 30-40 miles a week comfortably before the plan starts.
16+ weeks until race day. Sub-4 isn't a 12-week project for most runners. Give yourself the time.

If you don't have a recent half marathon time to check against, run one before the plan starts, or use a recent 10K plus a VDOT calculator to estimate.

Weekly Mileage

Most sub-4 plans peak at 35-50 miles per week. That's much less than sub-3 plans (60-80 mpw) but still meaningful. Hal Higdon's Intermediate I marathon plan peaks at 40 mpw and produces a lot of sub-4 finishers.

You can sometimes run sub-4 on lower mileage (30 mpw peak) with a quality-focused approach like the FIRST method, but the margin shrinks. More mileage gives more room for missed runs without derailing the goal.

The Plan Structure

A typical sub-4 week in mid-build:

Tuesday: Tempo or threshold (3-5 miles at half marathon pace, sandwiched by warmup and cooldown). 5-7 miles total.
Wednesday: Easy 4-5 miles
Thursday: Intervals (e.g., 6 × 800m at 10K pace, 90-second jog recoveries). 5-7 miles total.
Friday: Rest or easy 4 miles
Saturday: Long run, building from 12 miles in early weeks to 20 miles at peak
Sunday: Recovery 4-5 miles easy or rest

Total: 35-45 miles. One tempo, one interval, one long run. The simplicity is the strength.

The Long Run for Sub-4

Build long runs gradually:

Week 1-4: 10-14 miles, all easy
Week 5-9: 14-17 miles, mostly easy with occasional steady miles
Week 10-14: 17-20 miles, with the last 4-6 miles at marathon pace (9:09)
Week 15: 20 miles peak
Week 16-18: Taper (12, 8, race)

The marathon-pace finishes in the long runs are essential. They teach your legs to run goal pace when tired, which is exactly what miles 20-26 of race day feel like.

Pacing Sub-4 on Race Day

The math: 9:09 per mile is your target. The strategy:

First mile: 9:15-9:20. Slightly slower than target. The crowd pulls you faster.
Miles 2-20: 9:05-9:09. Lock in.
Miles 20-26: Hold 9:09 if possible. If you went out conservatively, you might have legs to push 9:00 in the last 5K.

The most common sub-4 failure is going out at 8:50 in the first 5K because it feels easy. By mile 18, that 8:50 catches up, and the second half slows to 9:30+, finishing closer to 4:05 than 3:59. Run conservatively early.

Common Sub-4 Mistakes

Skipping the long run. The single most common reason sub-4 attempts fail. You can't shortcut the long run. It's where the aerobic base for the second half of the marathon gets built.

Running long runs too fast. The second most common mistake. Long runs should be easy, about 60-90 seconds per mile slower than marathon pace. Running them at marathon pace turns them into junk miles.

Underestimating the taper. Sub-4 still requires a real 3-week taper. Cutting it to 1-2 weeks because you "feel fit" leaves you with tired legs on race day.

Build a sub-4 plan that fits your week

Pheidi creates a sub-4 marathon plan tailored to your current fitness, weekly time budget, and race date. Free, adaptive, ready in 60 seconds.

Build my plan

Key Takeaways

Sub-4 demands a 9:09/mile pace held for 26.2 miles. Achievable for most runners with 16-20 weeks of focused training.
Honest prerequisites: 1:55 half marathon, 30-40 mile base, 4+ days a week of running.
Most sub-4 plans peak at 35-50 mpw. Higdon Intermediate I (40 mpw peak) is a proven template.
Standard structure: one tempo, one interval session, one long run, plus easy days.
Long runs build to 20 miles, with marathon-pace finishes in the last 5-6 miles for late-build sessions.
Pace race day conservatively. First mile 9:15-9:20. The most common sub-4 failure is going out too fast.

Frequently Asked Questions

Can I run sub-4 on my first marathon?

Possible but uncommon. Most first-time marathoners finish in the 4:15-5:00 range, so sub-4 on the first try requires a strong half marathon time (under 1:55) and disciplined pacing. If you've never raced a marathon, set a more conservative goal first and chase sub-4 on attempt two.

How many days a week for sub-4?

Four days is the sweet spot. Five days works for runners with extra time. Three days is possible with the FIRST method (one quality, one tempo, one long), though the margin is tighter. Six days is rarely needed for sub-4.

How long should my long runs be for sub-4?

Build to 20 miles. Some plans peak at 18 (Hansons-style) or 22 (more aggressive plans). Twenty miles is the sweet spot for most sub-4 attempts, long enough to build the aerobic engine, short enough to recover from.

What pace should my long runs be?

Easy. About 9:45-10:30 per mile for a sub-4 target. That's 60-90 seconds slower than marathon pace. Late in the plan, the last 4-6 miles can be at marathon pace (9:09) to teach your legs to run goal pace when tired.

Should I run with a pace group on race day?

Often a good idea for sub-4 runners. Most big races have 4:00 pace groups. The trick is finding a pacer who runs even pace, not one who goes out at 8:55 and slows down. If your pacer is running 8:55 in the first mile, drop back.

What's the difference between Higdon's Intermediate I and II for sub-4?

Intermediate I peaks at 40 mpw with 4 days of running. Intermediate II adds a fifth day and peaks closer to 45-50 mpw. Both produce sub-4 finishers. Pick by what you can sustain, Intermediate I if 4 days fits your life, Intermediate II if you can do 5.

What 4:00 training actually looks like

9:09Goal pace / mi
45 miPeak week
20 miLongest run
18Weeks
5Runs / week

That peak week is the honest cost of the goal. Running 4:00 for the marathon means 9:09 per mile (5:41 per km) held the whole way, and the training that supports it tops out around 45 mi a week with a 20 mi long run. If those numbers don't fit your life right now, the goal isn't wrong, the timeline is.

Week 1, day by day

Week 1 is base phase, so there is no hard session in it. The strides are form work at the end of an easy run, not a workout. Distances are ranges for the same reason the ladder below uses ranges: the right number depends on what you're already running. The week totals 27 to 35 mi across 5 runs.

Week 1 of a 4:00 marathon training plan, day by day
Day	Workout	Distance	Pace	Why
Monday	Rest	-	-	Full rest, or an easy walk or bike if you want to move.
Tuesday	Easy + strides	4.5 to 7 mi	Easy pace, strides relaxed	Strides after an easy run, 6 x 20 sec. Form work at the end of an easy run, not a workout.
Wednesday	Easy run	4.5 to 6.5 mi	Easy pace	Conversational the whole way. If you could not talk, it was too fast.
Thursday	Easy run	4 to 6 mi	Easy pace	Conversational the whole way. If you could not talk, it was too fast.
Friday	Rest	-	-	Full rest, or an easy walk or bike if you want to move.
Saturday	Long run	10 mi	Easy pace	The anchor of the week. Run it easy; the distance is the stimulus.
Sunday	Recovery run	4 to 5.5 mi	Easy pace or slower	The shortest, softest run of the week. Slower than easy is fine here.

Your training paces for 4:00

Jack Daniels' zones, worked back from the goal time (VDOT 37.9). Read these as what running 4:00 requires, not what you can run today. If easy pace looks slow, that's the table working: easy days being too fast is the most common training mistake at every level.

Training pace zones for a 4:00 marathon
Zone	Per mile	Per km	What it's for
Marathon goal pace	9:09	5:41	What 4:00 actually is, mile after mile.
Easy	10:16	6:23	Most of every week. Slower is fine; faster is the classic mistake.
Threshold	8:33	5:19	Comfortably hard. Tempo runs and cruise intervals live here.
Interval	7:51	4:53	VO2max work. Repeats of 3 to 5 minutes with jog recoveries.

The same fitness that runs 4:00 for the marathon is worth roughly 25:14 for 5K, 52:22 for 10K and 1:56:06 for half marathon. Equivalents are a sanity check, not a promise: the longer the distance, the more the prediction assumes training you may not have done yet. Run the numbers on your own recent race with the VDOT calculator.

The week-by-week plan

18 weeks, 5 runs a week. The long run is the anchor and steps back every fourth week so the build doesn't just climb until something breaks. Weekly mileage is a range because the right number depends on what you're already running, which is exactly the part a static plan can't know about you.

Week-by-week training schedule
Week	Phase	Long run	Weekly	Key workout
1	Base	10 mi	27 to 35 mi	Strides after an easy run, 6 x 20 sec
2	Base	11 mi	28 to 36 mi	Strides after an easy run, 6 x 20 sec
3	Base	12 mi	29 to 37 mi	Strides after an easy run, 6 x 20 sec
4	Base	11.5 mi	28 to 36 mi	Strides after an easy run, 6 x 20 sec
5	Base	12.5 mi	29 to 37 mi	Strides after an easy run, 6 x 20 sec
6	Base	13.5 mi	30 to 38 mi	Strides after an easy run, 6 x 20 sec
7	Build	14.5 mi	31 to 39 mi	Tempo, 4 to 6 mi at half-marathon effort
8	Build	14 mi	30 to 39 mi	Tempo, 4 to 6 mi at half-marathon effort
9	Build	15.5 mi	31 to 40 mi	Tempo, 4 to 6 mi at half-marathon effort
10	Build	16.5 mi	32 to 41 mi	Tempo, 4 to 6 mi at half-marathon effort
11	Build	17.5 mi	33 to 42 mi	Tempo, 4 to 6 mi at half-marathon effort
12	Build	17 mi	33 to 42 mi	Tempo, 4 to 6 mi at half-marathon effort
13	Build	18 mi	33 to 43 mi	Tempo, 4 to 6 mi at half-marathon effort
14	Peak	19 mi	34 to 44 mi	Goal-pace work, 8 to 12 mi at marathon pace inside the long run
15	Peak	20 mi	35 to 45 mi	Goal-pace work, 8 to 12 mi at marathon pace inside the long run
16	Taper	14 mi	22 to 28 mi	Short goal-pace touch, 2 to 3 mi, then done
17	Taper	10 mi	16 to 20 mi	Short goal-pace touch, 2 to 3 mi, then done
18	Taper	Race day	Race week	Two or three short easy runs with a few strides. Nothing else.

Easy runs fill the rest of the week and should stay genuinely easy: conversational, slower than feels satisfying. That's the 80/20 split doing its work. If you miss a week, don't try to make it up. Rejoin the plan where the calendar is, not where you wish you were.