I've done 3 of my 4 marathons with TNT and I don't know how many cycling events as a participant and a coach. I've been coaching cyclists with TNT since 2001.

It's a great organization and you're definitely working for a good cause. The events are great - I highly recommend the century over the marathon, but I don't really like running. If you do (even if you don't), then the marathon is amazing. I think a century would be a lot better than a half marathon - no offense meant to anyone - lord knows I am no runner, but as an "epic" event, the half marathon just doesn't seem to have the same feeling as the full marathon or century.

Feel free to ask (or PM) if you have other questions.