When you’re training for marathons or half marathons, you will inevitably do double digit mile long runs. When you start to have long runs on your schedule, they take some time to plan out. Depending on where you live, you need to figure out a safe route and if you are going to run alone or if you have a training partner. It’s also important to know how you will handle your hydration and nutrition for the run. Do you have water fountains that are readily available, can you stash your bottles at various friends or neighbors so you have water along the way, and make sure that in addition to your hydration, you are using the fuel (gels/gummies etc.) that you plan to use on your race. Will there be bathrooms along the way for you to use should you need them? You want your training runs to be as much like you race as possible.
For more information on how to train for your long run, take a look at the article from Runner’s World.