BolderBoulder 2018 – the 40th anniversary race. This is a race that has been on my bucket list for a few years and after running it I highly recommend it. Started as a small group of friends running in 1978, it has grown to be one of the largest 10K races in the USA. The organization is superb – everything from the sign up process through race day. With an estimated 50,000 participants and over 100,000 spectators this is no mean feat.