Sub-2 hour half marathon pace: the splits and the block behind them.

Sub-2 hour half marathon pace, down to the second

Sub 2 hour half marathon pace is 9:09 per mile, or 5:41 per kilometer. Hold that for 13.1 miles and you finish in 2:00:00 on the dot, which is not under two hours. The number you actually want to train and race at is about 9:05 per mile (5:38 per km), which brings you home around 1:59:00 and leaves room for the course to be a little longer than your watch thinks.

That gap matters more than it looks. Across 15 years of coaching, the most common sub-2 miss I see is not a fitness problem. It is a runner who averaged 9:08 on their watch, ran 13.3 miles of weaving and wide corners, and crossed the line in 2:01. Your watch measures the line you ran. The race is timed on the shortest legal line through the course, and nobody runs that line perfectly.

If you think in kilometers, the pace conversion works the same in both directions, and the full half marathon pace chart has every row from 1:30 to 2:30 if 2:00 turns out to be the wrong target for this cycle.

Is a sub-2 hour half marathon good?

Yes. A sub-2 half is faster than the typical finisher at most big road halves, and for a lot of runners it is the first time goal that takes real training rather than just showing up. It sits in the same place as a sub-30 5K or a sub-60 10K: a round number that separates "I finished" from "I trained for something."

It is also a fair goal for a lot of people. The fitness behind it is roughly a 26-minute 5K or a 54 to 55 minute 10K, run recently and on a flat course. Those equivalents come from Riegel's race-time formula, which is a reasonable estimate rather than a promise, since it assumes you are as trained for the longer race as for the shorter one. If your recent races are in that range and your weekly running is steady, sub-2 is within reach in one focused block.

Who is ready to go after it

Pace is the easy part to calculate. Whether you can hold it for two hours depends on what is underneath. The runners I see break 2:00 on the first serious attempt usually arrive with:

• A recent race in range. A 5K around 26:00 to 26:30, a 10K around 54 to 56 minutes, or a previous half between 2:03 and 2:10 with a sense of where it fell apart.
• Steady weekly running. Four days a week for the last couple of months, somewhere around 20 to 25 miles, without a recurring injury.
• A long run that already reaches 8 to 9 miles. The block takes it to 11 or 12. Starting from 5 makes the block about building distance instead of pace.

If you are a few minutes short of those numbers, the goal is not wrong. The timeline is. Run a 10 mile race or a half at an honest effort this cycle, and go after sub-2 in the next one.

The training paces behind 9:05

A sub-2 block does not mean running 9:05 every day. Most of the week is slower than race pace, and two sessions are faster. Roughly:

The easy number is the one runners fight. A runner chasing 9:05 does not want to see 11:00 on their watch, so easy days drift to 9:45, and by week six the workouts start falling apart because nothing was ever easy. If that sounds familiar, this post on easy pace is worth ten minutes.

Three workouts that build the pace

A 10 to 12 week block needs only three kinds of quality session. Rotate them, one or two a week, never two on back-to-back days.

1. Threshold cruise intervals. 3 to 4 × 1.5 miles at 8:40 to 8:50, with 2 minutes of easy jogging between. This is the most important workout in the block. It raises the pace you can sustain without the effort spiraling, which is exactly what mile 10 asks for. It is a version of the tempo run, broken up so you can hold the pace honestly.
2. Goal-pace long runs. Every second or third long run, finish the last 3 to 5 miles at 9:00 to 9:05. This teaches you what race pace feels like on tired legs, which is the only version of race pace that matters.
3. 5K-effort repeats. 5 to 6 × 1 kilometer at 8:20 to 8:30 per mile, with 2 to 3 minutes of easy jogging between. Once every two weeks. Running faster than goal pace makes goal pace feel less like a ceiling.

A representative peak week

Around weeks 8 and 9 of the block, a typical sub-2 week looks something like this, at about 30 miles:

• Monday: rest, or easy cross-training
• Tuesday: threshold, 4 × 1.5 miles at 8:45 with 2 minutes jog (about 8 miles total)
• Wednesday: 4 miles easy
• Thursday: 5 miles easy with 6 relaxed strides
• Friday: rest
• Saturday: 3 to 4 miles easy
• Sunday: 11 miles, the last 4 at 9:00 to 9:05

That is a template, not a prescription. The right week depends on what your body absorbed the week before, which is why the plans I write change every week instead of being printed once. Lift twice a week for 20 minutes through the block too. It costs little time and it is part of what keeps runners healthy enough to reach race day.

Pacing a sub-2 hour half marathon on race day

The plan is simple. The discipline is not.

1. Miles 1 to 2: 9:10 to 9:15. Slower than goal. The crowd will pull you faster, your legs will feel rested from the taper, and every second you bank here costs you more later. Use these miles to find space and settle.
2. Miles 3 to 10: 9:00 to 9:05. This is the race. Run the tangents, the shortest line through each corner, and stop weaving. Check your split at each mile marker on the course, not the instant pace on your watch, which jumps around.
3. Mile 10 to the finish: whatever you have. If you are on 9:05 at 10 miles (about 1:30:46), you have 29 minutes and 13 seconds for the last 3.1 miles and still break 2:00. That is 9:24 per mile, a margin you can work with.

Choose the course and the day before you choose the pace. A flat course in cool weather is worth more than any workout in the final month, and 9:05 has no room for a warm morning. Heat and dew point add seconds to every mile, so check the heat pace calculator the night before and decide then whether it is a sub-2 day or a strong-effort day. Making that call at mile 9 is how good races turn into long walks.

If your race has a 2:00 pace group, use it as a reference, not a guarantee. Groups differ in how evenly they run and whether they aim at 1:59:30 or 2:00:00, and starting a few rows behind them can cost you more than the margin. Run your own splits and treat the group as company.

Fuel like the race is two hours long, because it is. Eat a proper breakfast two to three hours before the start (my pre-race eating plan covers the timing), then take a gel around mile 4 and a second around mile 8. The gel protocol explains why, and you should rehearse both on your goal-pace long runs, not discover them on race morning.

What to do this week

Run a 5K time trial or a local 5K race at honest effort. If it comes in around 26:00 to 26:30, you have the fitness to start a sub-2 block now. Pick a flat half 10 to 12 weeks out, set your training paces from the table above, and schedule your first threshold session for next week. If the 5K comes in slower, train for a strong half this cycle and let sub-2 be the next one.

And if you would like someone to write that block around your actual weeks, adjust it when work or sleep falls apart, and set the race plan with you, that is what my coaching is built for.

Written by

Coach Johnny Crain

2:12 marathoner. 4× US Olympic Marathon Trials qualifier. 4× NCAA national champion and 4× NCAA runner-up. Spoke at the RRCA National Convention. Founder and head coach at RunFitCoach, where he coaches every athlete personally.