Hmmm, hard to say but for most folks probably not recommended to head all the way up to Deadhorse at that time of year.
One way to think of the trip is in two sections, the highway up to Fairbanks and the the haul road to Dead Horse. On the highway, the road can be clear as long as it hasn't snowed recently and the plows have been out clearing and sanding.
On the haul road, it's mostly a gravel road used by heavy trucks and you will be very far north and winter lasts a long time up there. The trucks that travel that road will still be carrying chains to deal with the weather and that far north you can have winter and spring weather all in one day. Not saying that it might be an early spring and the road could be soft with melt, but ideally you should also be prepared for winter riding as well.
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