Tragedy on Mount McKinley is a standalone fanmade scenario for Arkham Horror LCG. In order to play it you will need the Edge of the Earth Campaign Expansion (and ideally The Dunwich Legacy campaign). It is strongly inspired by the "To the Forbidden Peaks" scenario, one of our favorite scenarios in that campaign.
While you should not need to print any card, if you wish, you can print a one page card PDF to have the Scenario/Act/Agenda cards and play without needing internet connection to this page: