The Department of Infrastructure says the Mountain Road is unlikely to open this weekend.
On Facebook, it says more freezing weather looks set to bring further wintry showers along the route.
It closed the length of the road earlier today after heavy snow overnight.
The DOI says it'll continue monitoring conditions and will reopen it sooner if it's safe to do so - but adds it's likely to open again on Monday, February 16.
High ground could see 4 inches of snow on Saturday night
Yellow warning for freezing temperatures tonight
School bangers night called off
AK47 and Uzi handed in to police
"No dispute" over Liverpool Ferry Terminal, says main contractor
More weekend bus strikes to come after 10-day walkout?
Minister to face question about bus strike
No rush to resurface Tromode Road