Northern Tier

The Northern Tier can refer to

Northern Tier (Pennsylvania), five northern counties in Pennsylvania.
The Northern Tier National High Adventure Bases of the Boy Scouts of America
During the Cold War, in England and the U.S., it refers to the Four Middle Eastern members of the Central Treaty Organization: Turkey, Iraq, Iran and Pakistan.
The Northern Tier Bicycle Route
Northern Tier (United States), the northernmost confine of the lower 48 United States

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