The race started a few hours ago, at the time of creation. You can see the list of runners here: https://docs.google.com/spreadsheets/d/e/2PACX-1vS7bFn8RH5Na4vVxNijCsFCiHeYqRksDi5D9ddC9Fz4yK7nOQhEg8HwG78lz-PFVB2EkFn4QlJKEXMV/pubhtml#

The best place to get updates is on Twitter, using the #bm100 tag: https://twitter.com/hashtag/bm100?src=hashtag_click