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

All Articles

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.