A 16-week marathon training plan covering base building, long runs, speed work, taper and race day, with the weekly mileage progression that prevents the injuries that derail most first marathons.
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Open in the app →First marathons fail in week 10 from injury, not race day from underfitness. Mileage progression is the safety mechanism: increase weekly mileage by no more than 10% week over week, with a recovery week every 4 weeks. This 16-week template builds from a base of 15–20 miles per week to a peak of 35–45 miles per week, then tapers for the final 2 weeks. Adjust mileage to your starting fitness, and pace yourself off the long run rather than the speed sessions.
Build the aerobic base. 4 runs per week at easy conversational pace. Long run grows from 8 miles to 12 miles. Total weekly mileage from 18 to 25 miles. Cross-train (cycling, swimming, yoga) 1–2 times per week. The goal of these 4 weeks is uninjured progression, not speed.
Introduce speed work: one tempo run and one interval session per week. Long run continues growing, peaking at 20 miles in week 10. Pay attention to nagging pains; minor injuries in this phase become major ones in week 14. Hydration and fueling strategies tested during long runs.
Highest mileage of the plan. Long run stays at 18–20 miles. One quality speed session per week. This is where the body is being asked the most: sleep, nutrition, recovery matter more than ever. Race-pace miles in some sessions to dial in goal pace.
Reduce mileage by 25% in week 14, another 35% in week 15. Speed work stays in to keep legs sharp, just shorter. Avoid new shoes, new fuel, or new stretches. Trust the work; the fitness is already built.
Easy runs early in the week, last run 2 days before race. Carb load starting 3 days out. Lay out kit the night before. Race day. Pace conservatively the first half, push the second half if legs feel good. Recovery: 2 weeks easy or off, then resume training if continuing to race.
16–20 weeks is the recommended range for first-time marathoners with a running base. Less than 14 weeks risks injury; more than 24 risks burnout.
IT band syndrome, plantar fasciitis, and runner's knee. Most are overuse injuries from increasing mileage too fast.
No. Easy runs should be conversational pace; tempo runs should be comfortably hard; intervals are hard. Mixing intensity is what builds different physiological systems.
Open the marathon template, set race day, and you have a working 16-week plan with the progressive mileage that builds fitness without injury.
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