We've talked a lot about how to train for your first 50K ultramarathon, but what about jumping from the 50K to the 100 mile distance? Unsurprisingly, there's a lot to learn when going from 31 miles to triple digits. In today's episode, Doug shares the important long run, training, nutrition, and technique strategies to make sure you avoid unnecessary issues come race day. If you're thinking about running a 100-mile ultramarathon, start here.