Just a quick note to turn you on to a project in South Korea to provide 10k of genuine, sustainable singletrack. There are an insane number of miles of trails here in the ROK but very few are actually rideable due to grade or poor building technique requiring stairs.

The blog is new and will grow some in the next few days as I dump info in. http://mtbincheon.blogspot.com/

Cheers,
Crockpot