These runners can chalk this race up to a glorified practice run.  And, I think the only way to handle this situation is to laugh about it.  I know when I read this story I got a good laugh about it.

The story comes from Ananova.  Check it out.

 

Many of the 530 runners participating in a 10K race in Newcastle, England ended up going the wrong way after the mistook a passing cyclist in a bright yellow shirt for their course guide. Runner Les Venmore said, "The cyclist was dressed in fluorescent clothing and as the leading group of runners ran closer to him they mistook him to be a race official and mistakenly followed him to the right instead of carrying straight on." Therefore, some participants, including the eventual winner Ian Hudspith, who managed to stay on the correct course, suddenly found themselves behind runners they had been ahead of. Event organizer George Routledge said most of the runners seemed to "take it all in good heart" with a "lot of laughing and joking".

 

Have a great day!