The N.W.T.'s Mackenzie Valley Winter Road will close for the season at midnight Wednesday.
The Department of Transportation says the road is rapidly deteriorating due to warmer weather.
The road from Wrigley to Norman Wells is already closed. The roads from Norman Wells to Fort Good Hope and from Fort Good Hope to Colville Lake will also close at midnight.
In the Fort Simpson region, the Nahanni Butte ice crossing will also close for the season at the same time.