Longest driven off interstate or freeway

[kkt]

Kamloops, B.C., where freeway-like road ends to Yellowknife, N.T., and back.  2000 km each way.  But that might be contrary to the spirit of the question, because I wasn't deliberately avoiding freeways...

In college, bored and carless, I searched the atlas for the most remote place connected by road and resolved to drive to Yellowknife.  Never did it, but at least now I know it's doable.  How was the drive?

The drive was great.  The roads were excellent, design speed 70 mph+, except the last 40 miles or so into Yellowknife.  Enormous shoulders on both sides, which in one place was in use to land a helicopter engaged in forest fire fighting.  Although it's a two-lane road, at every entrance there's exit and entrance lanes, so the fast lane never has to slow down.  Even if it's just to serve one house.

The NT part of the highway has bison along it and occasional bears.  They're the speed enforcement -- can you see a bison that blends in with its surroundings in time to stop?  Because they're certainly not moving.

The waterfalls in the parks along the way are well worth stopping.

North of High Level, gas stations become scarce and 89 octane disappears.  Into NT, 91 octane also disappears.

The country near Yellowknife is really different than you'll see most places.  There's not much soil, the trees and plants are trying to live on the bare rock.  It's very flat and marshy, or ice in the winter.  There are trees, but they're scraggly dwarfs, 8 to 12 feet high with some dead branches.  The trees are widely spaced, so you could easily walk between them most places.  We observed the Transit of Venus from an outcrop that was maybe 30 feet high, and at that height we could see hundreds of miles in any direction.

[kkt]

In college, bored and carless, I searched the atlas for the most remote place connected by road and resolved to drive to Yellowknife.  Never did it, but at least now I know it's doable.  How was the drive?

Yellowknife isn't that remote anymore.  You don't even have to leave the pavement to get there, if you go through Alberta. 

True, the road is excellent, but signs of human habitation away from the road are few.

Technically when we went two years ago we did have to leave the pavement, to cross the Mackenzie River on the ferry Merv Hardie.  Now the bridge is open, though.

[TEG24601]

My longest was either Buffalo, WY to Livingston, MT, via Yellowstone NP or Rawlins, WY to Idaho Falls, ID, via Yellowstone NP.

[agentsteel53]

The NT part of the highway has bison along it and occasional bears.  They're the speed enforcement -- can you see a bison that blends in with its surroundings in time to stop?  Because they're certainly not moving.

for those wondering what NWT looks like:

https://www.aaroads.com/blog/2011/10/03/northern-canada-sept-11-part-i/
https://www.aaroads.com/blog/2011/10/19/northern-canada-sept-11-part-ii/
https://www.aaroads.com/blog/2011/12/05/northern-canada-sept-11-part-iii-8/

[JMoses24]

From I-75 at exit 29 in Corbin, KY to I-81 exit 8 near Morristown, TN: 101 miles. That's the furthest on a single route which is what I presume the question to be.