Marathon Sub-3:15 Training Plan

Level: Intermediate
Duration & Snapshot: 16 Weeks • 5–6 Runs per Week
Running a marathon in 3 hours 15 minutes or faster means averaging just under 4:37 per km (7:24 per mile). This benchmark requires serious dedication, consistent training, and a smart mix of endurance and speed work.
This plan, designed by Olympian runner Ilya Tyapkin, builds fitness progressively through carefully structured weeks of intervals, tempos, long runs, and recovery phases. By the end of 16 weeks, you’ll be prepared to line up with confidence and execute a strong sub-3:15 performance.
✅ Long runs up to 35 km for endurance
✅ Intervals (400m–2 km) for speed & strength
✅ Tempo runs for sustained race rhythm
✅ Recovery & taper weeks for adaptation
✅ Proven Olympian-designed structure
Training Plan Breakdown
The program follows progressive phases to maximize adaptation:
- Base (Weeks 1–3) → Aerobic foundation, tempos, 15–22 km long runs
- Recovery (Week 4) → Reduced mileage for adaptation
- Build (Weeks 5–7) → 1–2 km intervals, fartlek, and long runs up to 28–30 km
- Recovery (Week 8) → Step-back week to consolidate fitness
- Peak (Weeks 9–11) → Toughest block: long tempos, 2 km intervals, and long runs up to 35 km
- Sharpen (Weeks 13–14) → Shorter but focused workouts, long runs 28–30 km
- Taper (Week 15) → Reduced volume, strides, light intervals
- Race Week (Week 16) → Easy runs, drills, strides, and your marathon at sub-3:15 pace
Sample Week Preview
Here’s a snapshot of Week 10 (Peak Phase):
| Day | Session | Load |
|---|---|---|
| Monday | 10 km easy run | Medium |
| Tuesday | 3 km WU + RD + 6–8 × 2 km intervals (400m jog recovery) + 3 km CD | High |
| Wednesday | 12 km easy run | Medium |
| Thursday | 3 km WU + RD + 12 km tempo run + 3 km CD | High |
| Friday | Rest | — |
| Saturday | Long run – 32–35 km | High |
| Sunday | Rest | — |
Load = effort level: Low / Medium / High
How Does the Training Plan Work?
This Sub-3:15 marathon program alternates hard training blocks with recovery weeks to steadily push your endurance and speed:
- Intervals (400m–2 km) → Boost running economy and speed endurance
- Tempo runs → Teach rhythm and sustained effort near goal pace
- Long runs (28–35 km) → Build endurance and race-day resilience
- Recovery & taper → Ensure you peak fresh and strong on marathon day
What Paces Should I Train At?
All pacing guidance for easy runs, intervals, tempos, and marathon pace is included in the downloadable PDF plan.
Coach’s Insight
“Sub-3:15 requires both discipline and patience. Train smart, don’t push too hard on easy days, and trust your taper. Marathon success comes from pacing discipline and consistency.”
— Ilya Tyapkin, Olympian Runner & Coach
Helpful Resources for Runners
- Race Day Checklist
- Gear Reviews
- Nutrition for Runners
- Injury Prevention
- Pace Calculator
- Calories Burned Calculator
- VO2 Max Calculator
Final Words
Breaking 3 hours and 15 minutes in the marathon is an ambitious but realistic goal with structured training. This plan ensures you build endurance, sharpen speed, and arrive tapered and confident for race day.
Remember:
- Consistency > perfection
- Respect recovery weeks
- Patience in the first half pays off in the second
Your sub-3:15 marathon is within reach.




