Training

The Half-Marathon Tune-Up Race Schedule (Race Your Way Into Shape)

Slot two races into your half-marathon build: a 5K about six to seven weeks out to remind your legs what racing feels like, and a 10K about three to four weeks out as a fitness test that predicts your goal pace. Both replace a hard workout, not the long run. Nothing in solo training rehearses corrals, adrenaline, and pacing under pressure — that's what tune-ups are for.

Why race while training for a race

Two reasons, one physical and one procedural. Physically, a race pulls an effort out of you that you can’t self-administer on a Tuesday — the field does the work your discipline can’t. Procedurally, it’s a dress rehearsal: parking, packet pickup, corral placement, the breakfast that sits right, the shoes with the socks. Runners who tune up don’t spend goal-race morning solving problems for the first time.

The 12-week shape

  1. Weeks 1–5: build quietly. Long run grows, no racing. Get the bridge work done.
  2. Week 6 or 7: race a 5K. Purpose is sharpening and rehearsal, not a PR. Warm up a mile, race it honestly, cool down. Keep the long run that weekend, shortened.
  3. Weeks 8–9: absorb. Back to building; the biggest long runs live here.
  4. Week 10 or 11: race a 10K. The fitness test. Whatever pace you hold for 10K, your half pace is roughly 15–20 seconds per mile slower — the most reliable prediction you’ll get.
  5. Final 2 weeks: taper, no racing. Short, easy, and boring on purpose. Read the race-week checklist.

What each tune-up teaches

  • The 5K teaches your legs turnover and reminds you that “uncomfortable” is survivable and finite.
  • The 10K teaches pacing discipline — it’s long enough to punish the hero start, exactly like the half will.
  • Both test your gear, breakfast, and warm-up routine while the stakes are low enough to fix mistakes.
  • Neither should be run in brand-new shoes, with new fuel, or after a sleepless week. Rehearsals rehearse the real plan.

Finding the tune-ups

This is a supply problem, and fall solves it: our calendar has 195 half marathons in October and 193 in November, with 5Ks and 10Ks stacked every weekend around them. Pick your goal half first, then count backwards and use the month pages — for example Chicago’s October races — to find the tune-ups that land in the right weeks. Start with your city, and set your predicted paces with the pace chart.

Quick answers

Should you race during half marathon training?

Yes — one or two tune-up races sharpen fitness and rehearse race-day logistics in a way solo workouts can't. A 5K around 6-7 weeks out and a 10K around 3-4 weeks out is the classic pattern, with the 10K doubling as a fitness test for your goal pace.

How many weeks before a half marathon should you race a 10K?

Three to four weeks out. That's close enough to reflect your current fitness and predict a realistic half pace, and far enough that the recovery costs nothing. Avoid all-out racing inside the final two weeks — that's taper territory.

Does a tune-up race replace the long run?

Not usually. Treat a 5K tune-up as your quality session that week and keep the long run, shortened slightly. For a 10K tune-up, many plans have you warm up 2 miles, race, then cool down 2-3 miles so the day still totals a decent distance.

Published 2026-07-21 · RunFinders