Inside the Training Log: Weekly Mileage Breakdown for Half Marathon Prep - Seth James DeMoor

Aug 13, 2025

Intro

This is a quick summary of Inside the Training Log: Weekly Mileage Breakdown for Half Marathon Prep from Seth James DeMoor. It’s a great watch — we’re breaking it down so you can try the workout today. Be sure to check out the full video for all the details.

Key Points

Typical peak weekly mileage for a half‑marathon is 60‑70 miles (or ≈ 96‑112 km) for experienced runners; adjust based on experience and health.
Ask yourself four planning questions: peak volume, rate of ascent, length of peak phase, and whether you’ll include an absorption (down) week before taper.
Use a range rather than a single number (e.g., aim for 60 mi/week with a 55‑65 mi flexibility) to accommodate life stressors or minor illnesses.
Stair‑step your mileage: increase by ~10 mi for a few weeks, then drop a bit, repeat. This helps the body adapt without overwhelming it.
Plan to hold your peak volume for about 6 weeks, then consider an absorption week (often around week 10) before tapering.

Workout Example

6‑Week Peak Mileage Block (miles)

Week	Target Mileage
1	50 mi
2	60 mi
3	70 mi
4	80 mi
5	90 mi
6	100‑110 mi (peak)
7‑8	Optional absorption week (~70‑80 mi) then start taper

Feel free to convert to kilometers (1 mi ≈ 1.61 km) and adjust the numbers to fit your own fitness level.

Closing Note

Give this mileage plan a try and tweak the paces to match your own training zones in the Pacing app. You’ve got the tools—now go log those miles and crush that half marathon! 🚀