10K pace chart

Goal time on the left, required pace per kilometre and per mile next, then your even-pace checkpoints at 2K, 4K, 6K and 8K.

The 6K checkpoint is the honest one. If you are on target at 6K and still comfortable, the time is yours; if you are on target and already straining, the last four kilometres will take it back.

A 10K sits in an awkward place. It is fast enough that the opening kilometres feel like a 5K, and long enough that treating them like one is expensive. The classic 10K is a first 5K run 20 seconds per kilometre too quick and a second 5K spent paying for it.

Run the first two kilometres about 5 seconds per kilometre slower than goal pace. It will feel far too easy, which is the point — you want to be reeling people in from 6K rather than being passed from 7K. Then hold goal pace to 8K and race whatever is left.

Effort is the check when conditions interfere. On a hilly course or a warm morning the chart's pace stops being the right target, and forcing it through 6K is how a manageable slowdown becomes a walk.

Double a recent 5K time and add 60–90 seconds. That estimate holds up well for anyone running three or more times a week. If your weekly mileage is low, use the upper end — the 10K exposes endurance gaps that a 5K hides entirely.

The other honest input is your long run. If your longest recent run is 8 km, a 10K goal pace drawn from your 5K speed is optimistic; the distance itself is the limiter, not the pace.

Two things, and neither is running more 10Ks.

Threshold work. Sustained efforts at roughly your one-hour race pace — 20 to 40 minutes continuous, or broken into 8–10 minute blocks — raise the pace you can hold before fatigue compounds. This is the single highest-return session for the distance.

Volume. The reason a 10K fades at 7K is usually aerobic, not muscular. Adding an easy run a week does more for a 10K time than adding a hard one, which is counterintuitive enough that most runners do the opposite and plateau.

Intervals help at the sharp end, but they are the smallest of the three levers and the one most likely to be overused.