This 12-week marathon 2.4 intermediate training plan prepares for a marathon in under 3:10 hours with 5 running days/week. Training starts at 50 miles/week and peaks at 55 miles/week. For each run, I provide the exact pace range. Simply set up your individual paces based on your current fitness level with a click of a mouse button. Finally, you can conveniently upload the runs to your Garmin watch. This plan includes free email coach support.