I just completed The Trans Labrador Highway starting from Blanc Sablon in Quebec, riding a V-strom 650 on street tires (conscious decision, I knew I will pay the price in time and stress). The gravel starts at Rad Bay and up to Port Hope I found it the most difficult part due to the garvel being loose on very hard white clay, riding like on bearing ball. It is mentally tough since the conditions change every few dozen meters, have to constantly search for the most stable trajectory. On the other hand I think another recent R&R on this site found out that stretch quite easy, the riders had knobby tires so I guess that their grip on the loose gravel is quite good. From Port Hope to Happy Valley 320 km alternating loose gravel with washboard conditions, I felt lucky being born human and not a tire or a shock absorber. The last 30 km are fully loose gravel not very well packed, in view of laying down asphalt sometime in the future. I had the same experinece on the Veteran's Bridge with the added problem that coming from the South the bridg is right after a corner with very little visibility (you can see it in the video posted by kr1) and one has barely the time to allign the moto with the bridge and then let it go based on inertia, do not change direction, brake or accelerate and you should we make it to the end of the bridge after dancing a bit. I will write to the Government of NF and Labrador, they should fix the bridge, one day somebody will be killed. Strange bu the bridge is of the exact same construciton as the otehr one between Happy Valley and Chruchill Falls (also shown in this RR) where the bike was very stable, no problmes. There is something fishy wiht the Veteran's bridge. Suggest kr1 to also complain to the government, the more we are the better the chances for them doing somthing. The owner of the B&B in Happy Valley told me that car drivers complain of loosing control on that bridge, one of them even thought he had a flat tire. There are two more stretches of unpaved road, one of 67 km starting after Fermont and ending at Fire Lake and another one of 101 km from Relais Gabriel to Manic 5. I did no find them too difficult, but the feeling of difficulty depends on the person, its skills, the tires, weather (rain or not, wind), etc. The total of unpaved road is 626 km, which about 400 miles. My total ride from Montreal was 3964 km with an average of 528 km per day.