Hey Mike,
This thread has some info about a few out my way, but the real deal is there aren't many
good roads within an hour of the Metro. You pretty much have to get almost all the way to Red Wing and then to the S and E into WI for relatively unpopulated roads with good curves.
My suggestion is always... go to Borders get a DeLormes Gazeteer of MN (and WI)... look for the squiggliest lines you can find and check them out. They're easy to spot because there aren't many...
IIRC you're in Oakdale so you might be in 1 hr. striking distance of O in WI. It goes south off 10E of Prescott all the way to 35 on the river. Another close
good road in MN is 7 south off 61 through Welch.