How many of you have heard of this? How many of you have participated?
This looks like so much fun!
From the website:
I wanted to do the local one this year but couldn’t due to illness. A friend did and assured me it was every bit as awesome as advertised. 
Some friends from Roller Derby did this and had a blast. Some of them finished the course and then went immediately back into it and did it again.
I heard an interview with one of the organizers who stressed that anyone in moderate to good physical fitness can do it and that it’s not a race. You can take thirty minutes to do it or two hours.
Sounds hella awesome!! I want a hard foam sword too!