Is This Program Right for You?
GA Endurance’s 10-week 100K / 50 Mile Ultra Advanced program is designed for experienced runners who already have most of their race-specific endurance foundation and want a short, focused build toward a 100K / 50 mile goal.
The program balances load and recovery, using long trail runs, climbing and descending skills, fueling practice, and controlled race-specific work to sharpen your existing fitness and prepare you for race day.
What You Can Expect
• Easy, long, and back-to-back trail runs
• Climbing, descending, and run-walk strategy sessions
• Strength and mobility work that supports durability
• Fueling, hydration, and equipment practice
• Planned lighter weeks that balance training load and recovery
• Race-specific endurance work and a structured taper
• HR and TSS-based training for clear workload tracking
Coaching and Support
Every workout includes the session purpose, intensity guidance, and practical execution details. For support with program setup, training zones, or TrainingPeaks, contact the GA Endurance team at coachsupport@gaendurance.com.
Starting Requirements
• Be able to run easily and continuously on trails for approximately 3–4 hours
• Be ready to train at least 5 days per week, including at least 4 running days
• Have experience with long climbs, technical descents, and varied terrain
• Be prepared to practise fueling, hydration, and equipment strategies
• Be able to recover from high-volume and back-to-back training; marathon, trail, or ultra experience is strongly recommended
A GPS watch and heart-rate monitor are recommended.
Final Note
This program turns an established endurance base into focused 100K / 50 mile race readiness. Consistent execution, disciplined intensity control, reliable fueling, and careful recovery will build confidence for race day.
Explore GA Endurance’s other training programs
I’m Goksen Cinar, MSc, a sports scientist, national team coach, and founder of GA Endurance. With 25+ years of experience and more than 2,000 athletes coached, I combine sports science, data analysis, and practical endurance coaching. I’m a 4-time IRONMAN 70.3 World Championship qualifier and 4-time full-distance IRONMAN finisher, providing full-time coaching built around each athlete’s goals and life.My coaching philosophy begins with the individual.