Drive the Seward Hwy South from Anchorage to Seward.
Drive the Seward Hwy North from Seward to Anchorage.
"Tundra" is an enviormental feature. There is tundra in both western and northern Alaska. I believe there may even be tundra in Anchorage. To find large amounts of tundra you would have to travel...
1,163.72 kilometres (723.1 miles)
Roughly 58 miles.
74.44 kilometres (46.26 miles)
According to Google Maps, it's 69.9 miles (112 km) from Anchorage to Willow. It should take about 1 hour and 17 minutes to drive, on average.