"The area is closed and we would like to remind people that entering a closed area is not permitted".
The 120-km stretch was expected to re-open Thursday evening.
According to a release on Sunday, avalanche risk is still very high in the Banff, Yoho and Kootenay areas, especially at the alpine and above-tree levels.
The yellow star on this map indicates the location of the avalanche that killed two snowshoers on the slopes of Mount Hector in Banff National Park, about 20 kilometres north of Lake Louise.
The man and woman, both 32, were reported missing last week.
Officials say their vehicle was found at a trailhead on Highway 93, otherwise known as Icefields Parkway.
A rescue team discovered snowshoe tracks leading to avalanche debris.
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The two tourists, who came from Boston, were caught in the avalanche on either Saturday or Sunday.
"Avalanche control work will be conducted as conditions allow and Parks Canada is hopeful that conditions will improve over the coming days so that a ground search can take place", said Peters.
Parks Canada said a helicopter flying over the area had picked up signals from two radio distress transmitters.
Because of unsafe conditions, crews weren't able to get into the area until Friday.
A ridge of high pressure builds for Friday, which has the rating at considerable for Friday.
Neither have been identified while their families are notified.