This is a 12 week half marathon plan for advance runners. It is geared towards a runner who has been running for several years and has participated in races before. Included in the plan are five days of running, one day of cross training, and one day of rest. Speedwork on a track, tempo paced runs, and a weekly long distance run are the keys of this plan. Mileage begins at 25 miles per week and reaches 40 miles a week. The goal of this plan is to run a half marathon in 100 minutes or less.