It’s one day designated by RAGBRAI that you can do an optional extra miles and you get a patch. It’s close to 100 miles for that day then. Sometimes a little less, sometimes a little more. It’s named after John Karras one of the original RAGBRAI creators. Everyone should do it at least once in their RAGBRAI life. I have done it – once. Once in 12 years . . . not sure if I’ll do it again. Probably not. An over-achiever, I’m not!!