This 14-week plan was designed by the experts at Runner's World for those who have been running consistently for several years and regularly log an average of 25 to 30 miles per week. It's geared for those who may have finished a half marathon and now want to finish faster. It features two days of rest and five days of running each week, including hill work, tempo runs, and a long run that starts at seven miles and peaks at 13 miles. Not the right plan for you? Check out Runner's World's training plans for beginners and advanced runners.