Claim: Connaught Tunnel is supplemented by the Mount Macdonald Tunnel.

Mount Macdonald is a mountain peak located in the Selkirk Mountains of British Columbia , Canada , immediately to the east of Rogers Pass in Glacier National Park . It is notable as the location of the Canadian Pacific Railway 's Connaught and Mount Macdonald Tunnels . At 14.7 km , the Mount Macdonald tunnel is the longest railway tunnel in the western hemisphere .   The original name of the peak was Mount Carroll -LRB- for a member of the CPR engineering team under A. B. Rogers -RRB- , but was renamed to honour the first Prime Minister of Canada , Sir John A. Macdonald by a Privy Council Order in Council # 551 on 4 April 1887 .