Looped races are the easiest to crew at because you get to see your runner coming through each loop.

Crewing can be a tiring job, especially if your crew has to chase you around a mountain or difficult terrain. Just think, if you spend an average of 10 minutes at an aid station, after 6 stops you have added an hour onto your race time! Having a crew helps cut that time down significantly and allows you to get back out without wasting precious minutes on the clock. These little conveniences add up to a lot of saved time on the course, especially when you are doing a multi-day event. They might fill your hydration pack for you while you are changing shoes or have your favorite sports drink mixed and waiting for you. The job of your crew is to help you get what you need when you come through the aid stations so that you can get out quickly and back onto the course without wasting much time. Crewing does not require much running if any at all. The jobs of crewing and pacing are vastly different. The longer distance you run, the more you will benefit from having a crew and pacers.

Ultra marathons come in different varieties of distances ranging from 50k to 500k and all kinds in between that. Ultra marathons by definition are distances greater than the 26.2 mile marathon distance.

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