How Far You Get from an Interstate?

OK, excluding, Alaska, Hawaii and other offshore areas, how far can you get from an interstate highway in the continental US? I mentioned to a friend that the panhandle of Oklahoma claimed the honor, he however is from Wall Lake, Iowa and so about ninety miles from an interstate. Further, he says he can drive north from his home and continue to move away from the highways.

How would your answer change if we included Mexican and Canadian highways in our calculations?

I would actually guess somewhere around the Nevada/California border, according to this map. That looks like the biggest interstitial (interstatial?) chunk of real estate.

Hugoton, KS is even further from any interstate; it is 171 miles from I-40, and 156 miles from I-70.

But I think even that is dwarfed by poor little Loring, Montana, which is a staggering 240 mile drive from Great Falls, where you can pick up I-15. Even if you cross over to Canada there’s no freeway for hundreds of miles.

Loring is only about 100 miles from the Trans Canada, though. It might only be two lanes between Swift Current and Medicine Hat, but it’s still an inter-provincial highway, as it were.

Tonopah, NV is approximately 200 miles from its two nearest interstate access points and about three from its third.

Is there any systemic way to do such a search?

By the way, I have been looking at real estate in Iowa on the net. For someone from the DC area, they seem to be giving homes away. Remarkable.

Copper Harbor, MI, seems to be about 250 miles by road from the three nearest interstates: I-39 near Wassau WI, I-535 in Superior WI, and I-75 near Sault Ste Marie MI.

When I saw the thread tittle I came in to say I was in Guam and ask what I won.
Then I read the OP. :smack:
Anyway I would guess either Tonopah or somewhere near there is about as far as you can get from the interstate and still be in the Contintnetal 48.

Copper Harbor MI has Tonopah beat. ~245 miles to I-39 in WI and over 300 to I-75 near St. Ignace.

I’m 160 miles from the nearest interstate. I like it that way.

Your friend from Wall Lake might want to check his numbers. According to Google Maps, Wall Lake is only 70 miles from I-29 (less as the crow flies). It appears to be about the same distance to I-35.