Longest U.S. Interstate Borders

These are the ten longest boundaries between U.S. states.
Borders between states and Canada or Mexico are not counted.
Quiz by iRDM
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Last updated: April 25, 2019
First submittedApril 25, 2019
Times taken792
Average score85.0%
Rating4.67
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mi
States
715.4
Texas
Oklahoma
608.4
California
Nevada
569.8
Montana
Idaho
536.2
Texas
New Mexico
456.6
Louisiana
Mississippi
mi
States
409.1
Oklahoma
Kansas
399.4
Nebraska
South Dakota
391.0
Arizona
New Mexico
385.8
Washington
Oregon
381.2
Virginia
West Virginia
+1
Level 85
Apr 25, 2019
NIce quiz. What's your source please?
+4
Level 60
Jun 11, 2022
i made it up
+1
Level 57
Jun 17, 2022
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