Head out to Cathael Stone Island in Boston Harbor for a unique trail running adventure—just hop on a short ferry ride (about 30 minutes) to get there! You'll tackle a 4K trail course, then stick around for food, drinks, and celebration time with your crew. This popular corporate fundraiser supports free, hands-on science education for Boston kids, and you can pick whichever date works best for you: Wednesday, May 20th or Thursday, May 21st, 2026.