In Sweden and many other countries we see a boom in sports events that take place outside the traditional arenas. There are more and more people, on all performance levels, that participate in races and competitions in running, cycling, skiing, swimming and so forth. In Sweden these races have become huge events with tens of thousands of participants, hundreds of thousands of viewers in the audience, arranged by big organizations, and sponsored by large companies. These events face many challenges in the introduction of new technology, creating richer experiences and interconnecting the different users; participants, audience, and organizers. The ambition of this project course, organized by the Interaction Design & Technologies program at Chalmers, is to show that Interaction Design can play an important role in the innovation process, design work and implementation of new systems in this context.