Last year, Nike hosted the world's largest running event — the first Nike+ Human Race had over 780,000 participants. It was such a hit, they're hosting another one on October 24, 2009, with the hope that this year it will be even bigger.

This race gives runners all over the globe the chance to run a 10K together on the same day. If you want to be part of it, there are two ways you can join. Either sign up for one of the runs hosted by Nike in more than 30 cities around the world. Or you can run a 10K wherever you choose — on a treadmill, in the woods, or by the beach. Just track your run with the Nike+ Sports Kit or the Sportband. Then upload your race data to nikeplus.com.

I did this race last year and it felt amazing to know that hundreds of thousands of people were running the 6.2 miles along with me, so I definitely plan on doing it again this year. If you're interested as well, register here, and then start training — you have about two months until race day.