Sorry, but in this case I'm not talking about public (eg: gov't, et al) data sources. For most of the MTB trail guides out there (eg: MTB Project, Trail Forks)

Sorry, but in this case I'm not talking about public (eg: gov't, et al) data sources. For most of the MTB trail guides out there (eg: MTB Project, Trail Forks) they ask users to submit trail data then they keep it locked up. I'm particularly bothered by this in the case of MTB Project which works with IMBA, a non-profit, yet doesn't share the data back with the greater world.