The Class D Western Tri-State League operated for two years, 1913 and 1914.


  • Baker, OR: 1913-14
  • Boise, ID: 1913
  • LaGrande, OR: 1913
  • North Yakima, WA: 1913-14
  • Pendleton, OR: 1913-14
  • Walla-Walla, WA: 1913-14

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