Ask most runners how their parkrun went, and they’ll often talk about the start.
The pace.
The first kilometre.
How they felt early.
But the truth is, most parkruns aren’t decided there.
They’re decided in the 4th Km.
Why the 4th Km Matters
By the time you reach the 4th Km, a few things have happened.
The early adrenaline has faded.
Your body is carrying fatigue.
The finish line is close… but not that close.
It’s an awkward part of the run.
Too far to sprint.
Too late to reset completely.
And that’s exactly why it matters.
Where Runs Start to Unravel
For a lot of runners, the 4th Km is where things begin to drift.
The pace starts to slip.
Form becomes a bit looser.
Focus fades just slightly.
Not dramatically — just enough to make a difference.
And over the course of that kilometre, those small losses can add up quickly.
What Strong Runners Do Differently
Runners who perform well tend to treat the 4th Km differently.
They expect it to be tough.
They don’t wait to see how they feel — they decide how they’re going to respond.
They stay engaged.
They hold their form.
They keep their cadence steady.
They treat it as the moment to stay in the race — not drift out of it.
A Mental Shift That Helps
Instead of thinking of the 4th Km as something to get through, think of it as something to work with.
This is where you make decisions.
Do you stay committed?
Do you hold your effort?
Do you keep moving forward?
That mindset alone can change how you run that section.
A Simple Cue to Use
When you hit the 4km mark, give yourself a clear instruction.
Something simple like:
“Stay with it.”
Or:
“Hold form.”
Or:
“Keep moving forward.”
You don’t need complexity here. Just something that keeps you focused on the task in front of you.
Setting Up the Final Kilometre
What you do in the 4th Km determines what you have left for the 5th.
If you stay engaged, you carry momentum into the finish.
If you drift, you spend the final kilometre trying to recover lost ground.
That’s why this section matters so much.
Bringing It Back to Saturday
The next time you’re at parkrun, don’t just think about the start.
Think about the 4th Km.
Expect it to be tough.
Plan to stay focused.
Commit to holding your effort.
Because that’s often where the run is shaped.
Not at the beginning — but right near the end.
Next Saturday, when you hit that 4km mark, treat it like the moment that matters most — and run it accordingly.