12-Week Intermediate Marathon Training Plan
**Build Strength. Develop Endurance. Race with Confidence.**
This 12-week marathon training program is designed for runners who already have a solid fitness base and are comfortable running 20–24km. The plan focuses on developing marathon-specific endurance, strength, speed, and resilience while balancing training load to reduce injury risk and maximise performance on race day.
The program combines structured speed work, hill training, trail running, long runs, and non-impact cross-training to create a well-rounded approach that builds both physical and mental toughness.
What You'll Get
✅ 12-week structured marathon plan
✅ Progressive long run build-up to 35km
✅ Weekly speed or hill sessions to improve running economy and efficiency
✅ Medium-effort trail runs to build durability and aerobic capacity
✅ Alternating bike and stair-stepper cross-training sessions
✅ Strategic de-load week to promote recovery and adaptation
✅ Marathon-specific taper to ensure freshness on race day
✅ Training Peaks-compatible workout descriptions
Ideal For
* First-time marathon runners with a solid running base
* Runners returning to the marathon distance
* Trail runners transitioning to road marathons
* Athletes looking for a balanced plan that includes strength and endurance development
* Runners seeking a structured approach without excessive weekly mileage
Program Highlights
**Speed Development**
Improve running economy, efficiency, and sustainable race pace through structured interval and threshold training.
**Hill Strength**
Build stronger climbing legs, improve running mechanics, and increase resilience through dedicated hill workouts.
**Trail Running Integration**
Weekly trail sessions improve balance, stability, strength, and aerobic fitness while reducing repetitive impact stress.
**Cross-Training**
Alternating bike and stair-stepper workouts provide additional aerobic conditioning while limiting impact-related fatigue.
**Progressive Long Runs**
Gradually increase endurance and confidence with long runs progressing from 24km to a peak of 35km before tapering into race day.
Training Commitment
* Running: 4 sessions per week
* Cross Training: 1 session per week
* Strength Training: 2 sessions per week
* Planned Mobility and Flexibility
* Peak Weekly Running Volume: Approximately 60–65km
Outcome
By the end of this program, you'll have developed the endurance, strength, pacing skills, and confidence needed to tackle your marathon goal while arriving at the start line strong, healthy, and prepared.
**Train smart. Build consistently. Race confidently.** 🏃♂️🏃♀️🏅
Hi, Coach M here, that is short for Marilette, I have been involved in sport and training since childhood. Thus Coaching and training came as a natural career path to me.
I provide a range of services from Endurance Coaching, Strength and Endurance, Flexibility and general wellness and nutrition Coaching.