Did you mean 566 or 556? Since you mentioned Iron Bridge, I assume you mistyped and meant 556, also known as Ranger Lake Rd. If you really did mean 566, sorry I can't help you there as I've never been on it. But I was on 556 two weeks ago. The first 80 kms (from hwy 129 to hwy 532) is a very twisty gravel road. I was unable to maintain a high speed as I am new to riding off pavement, but I guess if you're a good offroad rider you'd love this road. The road never felt that remote because there was a decent amoutn of traffic on it, lots of ATV's and pickups pulling trailers. Once you hit hwy 532, the next 20 kms of 556 to hwy 17 is paved and a very nice ride. I didn't go up 532 but it's paved and looks like a good ride too. A couple years ago I rode the 101 from Wawa straight through Timmins and into Quebec. It's not terribly interesting but is definitely a much nicer ride than the 11. Highway 631 is also a really nice ride, about 170 kms long, scenic twisty and almost no traffic, but the problem is once you get to the top of it there's nowhere to go but take hwy 11 which is really long straight and boring.