I don't remember where, but I ran across this website/app the other day. Pretty cool after messing around with it.
I didn't do any in app purchase but I was able to create a riding trip and then export it to my google earth on my phone. Pick your spots to ride and then chose the level of turns you want and it finds those roads. Other filters too to make it even more custom.
I'm going to screw with it before plunking down the app price of $10, but looks to be somewhat worth it.
Anyone else use it and have any input on its full functionality?