A Marathon is a race over a distance of 26.2 miles, or 42.2km. Running a marathon is often seen as one of the main goals in a runner's lifetime. Marathons take place across the United States, and these events often draw big crowds and inspirational atmospheres. The New York and LA Marathons are two of the most popular races in the USA. Both are relatively flat courses, and so are great opportunities to qualify for the Boston marathon, which is one of the six world marathon majors. US marathons are also amazing fundraising opportunities if you're feeling charitable. For example, every year the Boston marathon raises over $35 million, so marathons are a great way to mix personal achievement with helping the world.