Train for a half marathon without rigid weekly mileage.
21.1 km is a serious target but it doesn't need a rigid plan. Runallo builds your weeks around your goal, your fitness, and the time you actually have.
12 weeks3–5 runs/weekAll levels
Who it's for: First-time half marathoners and runners chasing a faster time.
Building your base
Early weeks focus on easy running and one longer run. Pace explanations make sure 'easy' really is easy.
Adding intensity
Mid-block introduces threshold and tempo work tied to your current ability — not generic times.
Long runs that build, not crush
Long runs progress sensibly, with cutback weeks and adjustments if you feel run down.
Frequently asked questions
Related plans
Free Running Plan
If you're getting back into running or trying to build a routine, you don't need a complicated plan. This free Runallo plan gives you three short, structured sessions a week with clear pacing and rest guidance.
5K Training Plan
Whether your first 5K or your fastest, Runallo's 5K plan blends easy runs, intervals, and one longer effort each week. Sessions explain themselves so you know why each one matters.
10K Training Plan
A 10K rewards patience and consistency. Runallo's plan gives you the right blend of easy mileage, threshold work and long runs — and adjusts whenever your week changes.
Marathon Training Plan
A marathon is built over months, not days. Runallo balances long runs, easy mileage and quality work, and adapts when work, family or fatigue gets in the way.