This 20-week half-marathon 3.1 advanced training plan prepares for a HM in under 1:25 hours with 6 running days/week. Training starts at 34 miles/week and peaks at 50 miles/week. For each run, I provide the exact pace range. Simply set up your training zones based on your fitness level with a click of a mouse button. • Upload all workouts to your running watch • Switch plan level, free within 14 days • Free email coach support