Looking to run down a huge marathon PR? This Level 3 8-Week Marathon Base Building running plan is perfect for runners looking for a challenge as they build their speed, and endurance before they start marathon training. Level 3 begins with a 60-minute long run and works its way up to a 120-minute long run. Running Plan in Final Surge Includes: • 4-5 days of running a week • 1-2 cross-training day(s) • 1 rest day • 2 speed play sessions a week • 2-3 strength training days with videos