In 1970 I drove to Alaska via the Alaska Highway entering from the Yukon Territory. We took a side road north from the Alaska Highway in the Yukon to Dawson city, well north of Whitehorse. The highway frojm Dawson to Alaska is called the "Top Of The World Highway" by the locals. Sure felt like it.
There are a few roads that might be north of this, nothing you'd want to get stuck in.
By the way, I was in Barrow, but you need to get there by plane from Fairbanks.