By Mel, MN (Mehollop) on Wednesday, August 18, 2010 - 09:19 am:
I haven't had much time to spend on the beaches lately (and most of the ones along Superior in Minnesota are more rock than beach), but I've had lots of good luck picking agates along gravel roads! They're not as nicely polished as the ones you find by the lake, but they seem to be more common, and easier to find amongst the grey and brown of the road gravel.