He was able to construct the theater by compressing loads of snow using snow shoes and then forming them into block shapes.
Whatmough told CBC News that the idea came to him during a trip to California when he found himself longing for the snowy atmosphere of his hometown in Canada.
"I thought it would be a really neat way for people to come out and see some of the adventure films I've produced and been a part of," he said.
Despite Whatmough's hard work, unseasonably warm winter weather posed a threat to his project and forced him to close the theater various times.
"The timing was actually pretty terrible with the warm weather," he said. "I spent more than eight days building it and got a couple of good showings out of it, but most of its melted now."
Whatmough ultimately didn't let the setbacks get him down and said he plans to reconstruct the theater when the weather will allow it.