Heh... good thing the stream was low
Actually, the fords are all concrete. They are smooth and easily sloped. As long as the water isnt too high there's no problem at all in a Miata. The road isn't rutted out either. I don't think they scrape it but maybe once every year or so, but so few people use it that it's still fairly smooth.
There was only one questionable spot, and that was the only steep uphill stretch, and it was OK too, just a little challenging if you're not used to driving a manual transmission up a steep gravel road, BUT, take it slow and everything is OK.
Honestly, from the looks of things, I don't think the stream crossings would be that bad even with the water up a bit. When we went, the water was just barely over the concrete, so it was more like just driving through any puddle you'd find 'round the triangle after a good storm, and a couple were even dry completely.
I only have one picture, because we took the road in the dark. I'm insane, but I also have some ... experience in taking small passenger cars places they probably shouldn't be. My mom never did find out about the time I took her old Nissan offroad through a mud field (never once got stuck), and I took a small rental over a mountain logging road once too...
I would NOT encourage anyone else to do it, BUT, if you like doing things like that, don't mind taking your time, and know how to drive a vehicle on gravel (especially very loose gravel), you'll be fine. It's beautiful through there, probably the most beautiful place I've ever driven a vehicle, especially in the twilight and then the dark of night.
It took us about an hour to navigate the whole road, even though it's only runs about 10 miles or so from Cades Cove, mostly because we were doing it in the dark for the most part, and partly because we had the top down and were enjoying being in a convertible in the middle of a giant old-growth forest with no other vehicles or people around for miles.
But again, I am insane, so I do things like that from time to time
