When I lived Boston, I participated in Cosmic Run with my friends and RA. We put on some electrics and ran 5km with great music. Then, there are so much color powder on the way to run. We threw and were covered with color powder. The goal was like a music party. There are DJs and sexy dancer girls on the stage. We enjoyed dancing and take photos with someone. Actually, I participated in similar event in Japan. However, it was small lot and low volume of music. Therefore, the US version of cosmic run is better.
アメリカと日本でcosmic run に参加しました。アメリカのほうが敷地が大きくて音楽も最高で盛り上がって楽しかったです。