Highway 11 Southbound at Highway 118 exit is now open and traffic is moving through very slowly.
Expect delays there and also in the north and southbound lanes at the Gravenhurst exit.
Sanders are reportedly making their way through now and officials ask drivers to give them plenty of room.
Bracebridge OPP reported just after noon that Highway 11 Southbound was closed at 118 due to a multi-vehicle collision.
Police are asking everyone to drive with extreme caution.