UPDATE: Chris in Houghton passed along the link to the minersrevenge.com web site!

Edward Vielmetti tipped us off to the Miner's Revenge bicycle race in Greenland (Michigan) which takes place July 11 & 12. He writes:

Here's a novel reuse of an old copper mine - the Miner's Revenge bicycle race is using a 1/3 mile long section of the mine no longer in active use as a part of the race course. Bring your own lights - it's dark in there.

The race is July 11-12, 2009, with free on-site camping for racers and a bonfire the night before. Greenland is near Ontonagon; the mine is owned by the Adventure Mining Company which also does walking tours as well as other more extreme mining adventures that involve rappelling down a mine shaft.

You can learn more about the Adventure Copper Mine and get details on the Miner's Revenge bike race.