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Longest state highways entirely within one county

Started by KCRoadFan, September 22, 2021, 09:12:15 PM

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KCRoadFan

Seeing the success of my post about the shortest state highways that go through multiple counties, I figured I might as well ask the inverse question: namely, what are the LONGEST state highways that are found in only ONE county?

If I had to guess, I would assume that most of them are out West, what with the huge counties in that part of the country (San Bernardino and Imperial counties in California come to mind in that regard).


bassoon1986

Louisiana's is LA 103. 37.96 miles completely within St. Landry parish. It's another example of Louisiana highways that you would never drive end to end. It's in the shape of a U.


iPhone

TheHighwayMan3561

Minnesota's looks to be MN 135, 36.16 miles all in St. Louis County.. MN 169, the vast majority of which is also in St. Louis County would beat it if it didn't clip into all of about 2 miles of Lake County at its eastern terminus (if this section gets turned back, it would pass MN 135).
self-certified as the dumbest person on this board for 5 years running

SkyPesos

Not sure if it's the longest overall, but Beltway 8 in Houston (Harris County) is the first that I can think of, at 88 miles long.

webny99

For New York state...

-Subject to confirmation, but I think the longest is NY 56, at 51.4 miles entirely within St. Lawrence County
-NY 12E, 36.1 miles entirely within Jefferson County
-NY 60, 33.2 miles entirely within Chautauqua County

Here in Monroe County, the longest is NY 383, at 18.7 miles.

jlam

Colorado's has to be CO 318. CO 318 is a 60 mile road entirely in Moffat county in remote northwestern CO, and it doesn't serve much purpose. It honestly shouldn't be signed as a state highway.

US 89

Looks like Utah's is SR 56, which spends all of its 61.5 miles within Iron County.

Dirt Roads

West Virginia:  WV-26 runs 41.3 miles from US-50 in Fellowsville to it connection with PA-281, all in Preston County.

NWI_Irish96

Not very long for Indiana. The southern IN 11 is 29.8 miles and entirely in Harrison County.
Indiana: counties 100%, highways 100%
Illinois: counties 100%, highways 61%
Michigan: counties 100%, highways 56%
Wisconsin: counties 86%, highways 23%

jp the roadgeek

CT: CT 25 spends all of its 28.59 miles in Fairfield County (though it once extended into Litchfield and Hartford County). Just beats out CT 154 at 28.24 miles in Middlesex County

RI: RI 116 at 25.1 miles in Providence County

MA: MA 8 at 66.64 miles in Berkshire County.  Just edges out MA 12 at 64.41 miles in Worcester County

ME: ME 161 at 83.03 miles in Aroostock County

VT: VT 102 at 43.75 miles in Essex County

NH: NH 118 at 37 miles in Grafton County
Interstates I've clinched: 97, 290 (MA), 291 (CT), 291 (MA), 293, 295 (DE-NJ-PA), 295 (RI-MA), 384, 391, 395 (CT-MA), 395 (MD), 495 (DE), 610 (LA), 684, 691, 695 (MD), 695 (NY), 795 (MD)

Dirt Roads

North Carolina:  Not entirely sure, but it looks like NC-143 running 38.3 miles from NC-28 in Stecoah to the connection with TN-168, entirely in Graham County.  Bonus, the last 18 miles is part of the Cherohala Skyway, which runs another 25 miles in Tennessee.

TBKS1

AR 72, about 42 miles long, entirely located in Benton County. I believe that's the longest one, although I didn't look that hard.
I take pictures of road signs, that's about it.

General rule of thumb: Just stay in the "Traffic Control" section of the forum and you'll be fine.

Bruce

Washington's is SR 112, which runs for 61.31 miles entirely within Clallam County.

GenExpwy

Quote from: webny99 on September 22, 2021, 09:33:38 PM
For New York state...

-Subject to confirmation, but I think the longest is NY 56, at 51.4 miles entirely within St. Lawrence County
-NY 12E, 36.1 miles entirely within Jefferson County
-NY 60, 33.2 miles entirely within Chautauqua County

Here in Monroe County, the longest is NY 383, at 18.7 miles.

Also NY 415, 42.8 miles in Steuben County

hotdogPi

Quote from: jp the roadgeek on September 22, 2021, 10:42:57 PM
MA: MA 8 at 66.64 miles in Berkshire County.  Just edges out MA 12 at 64.41 miles in Worcester County

Both of these go into other states.
Clinched, minus I-93 (I'm missing a few miles and my file is incorrect)

Traveled, plus US 13, 44, and 50, and several state routes

I will be in Burlington VT for the eclipse.

webny99

Quote from: GenExpwy on September 23, 2021, 06:41:42 AM
Quote from: webny99 on September 22, 2021, 09:33:38 PM
For New York state...

-Subject to confirmation, but I think the longest is NY 56, at 51.4 miles entirely within St. Lawrence County
-NY 12E, 36.1 miles entirely within Jefferson County
-NY 60, 33.2 miles entirely within Chautauqua County

Here in Monroe County, the longest is NY 383, at 18.7 miles.

Also NY 415, 42.8 miles in Steuben County

Nice catch! Don't know how I missed that, as I even looked at Steuben County, but must have overlooked the I-86 corridor.

7/8

If we include provinces:

I think the longest King's Highway in Ontario in one county is Highway 105 in Kenora District at 173.5 km / 107.8 mi. For secondary highways, I think it's Highway 652 in Cochrane District at 149.9 km / 93.1 mi.

oscar

In Hawaii, HI 11 is 122.09 miles, and is entirely within Hawaii County.

It's more complicated in Alaska. The longest route in Alaska that doesn't cross a borough or census area boundary is AK 5, about 123 miles long. It's entirely within the Unorganized Borough (the vast area not yet included in any organized borough), and the Southeast Fairbanks census area thereof. If you limit to organized boroughs, AK 9 in the Kenai Peninsula Borough is about 36 miles long, and the discrete AK 7 segment in Haines Borough is about 43 miles long (the other three, shorter disconnected fragments of AK 7 are each in other boroughs).

The longest Alaska route that doesn't cross a borough boundary is AK 4, about 269 miles long, all of it within the Unorganized Borough. However, it is in three census areas (Chugach, Copper River, Southeast Fairbanks).
my Hot Springs and Highways pages, with links to my roads sites:
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Takumi

I think Virginia's is VA 234, which currently is 33 miles entirely within Prince William County, though in the past it has entered other municipalities.
Quote from: Rothman on July 15, 2021, 07:52:59 AM
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Don't @ me. Seriously.

DTComposer

California: looks like it's CA-247 in San Bernardino County, 78 miles from Barstow to Yucca Valley.

Honorable mention to CA-180, 122 miles, almost all in Fresno County, but nicks the corner of Tulare County for 5 miles.

JayhawkCO

Quote from: jlam on September 22, 2021, 10:00:04 PM
Colorado's has to be CO 318. CO 318 is a 60 mile road entirely in Moffat county in remote northwestern CO, and it doesn't serve much purpose. It honestly shouldn't be signed as a state highway.

CO64 would barely nudge it out if it didn't have the little bit that went up to Dinosaur.

If they ever got around to filling in the gap on CO90, it would be 89.8 miles all in Montrose County.

Chris

tdindy88

Quote from: cabiness42 on September 22, 2021, 10:39:00 PM
Not very long for Indiana. The southern IN 11 is 29.8 miles and entirely in Harrison County.

The southern SR 11 starts in Floyd County before heading south into Harrison County. Now nearby, SR 337 (the southern segment) does stay entirely in Harrison County and goes for 22 miles.

Roadgeekteen

Quote from: 1 on September 23, 2021, 06:43:17 AM
Quote from: jp the roadgeek on September 22, 2021, 10:42:57 PM
MA: MA 8 at 66.64 miles in Berkshire County.  Just edges out MA 12 at 64.41 miles in Worcester County

Both of these go into other states.
True, but the actual state-maintained highway is only in Massachusetts. MA 8 does not exist in Connecticut.
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Current Interstate map I am making:

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hotdogPi

Quote from: Roadgeekteen on September 23, 2021, 09:04:40 PM
Quote from: 1 on September 23, 2021, 06:43:17 AM
Quote from: jp the roadgeek on September 22, 2021, 10:42:57 PM
MA: MA 8 at 66.64 miles in Berkshire County.  Just edges out MA 12 at 64.41 miles in Worcester County

Both of these go into other states.
True, but the actual state-maintained highway is only in Massachusetts. MA 8 does not exist in Connecticut.

MA 63 exists in New Hampshire, though.

(alpsroads. Obviously an error shield.)
Clinched, minus I-93 (I'm missing a few miles and my file is incorrect)

Traveled, plus US 13, 44, and 50, and several state routes

I will be in Burlington VT for the eclipse.

ran4sh

In Georgia it appears to be SR 192 in Emanuel County, which is about 30 miles.
Control cities CAN be off the route! Control cities make NO sense if signs end before the city is reached!

Travel Mapping - Most Traveled: I-40, 20, 10, 5, 95 - Longest Clinched: I-20, 85, 24, 16, NJ Tpk mainline
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