Guy's dad had a ride up the Alaska Highway to the Artcic circle on his bucket list, and he did it this summer. It seems to have been quite an adventure with a few adjustments along the way (heated pants, jacket, gloves...).
Proof that he made it. 1000km on a gravel road to get this far...
The Alaska highway is over 1500 miles long and was built in record speed to access the territory in case the Japanese used it as a staging area during World War 2.