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In this answer at; I am lost, I found a trail, which way do I go? It claims

...logging roads These may extend many miles into the forest, with multiple branches, all ending in dead ends. There can be 10's or 100s of miles (or kilometers) of roads.

If I am hiking on public land in the US, and find a road, just how far might I walk in the wrong direction, before getting to the dead end and needing to turn around and go back?

Without considering all the dead end branch roads, how long is the longest dead end road on or crossing, US public land?

Clarify: Where dead end = ends in the forest without any services or civilization, at the end or along the route.

James Jenkins
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While the exact definition of a "dead-end road" is rather vague, here are a few contenders for the continental US. Based off my poking around, saying that a dirt road could dead end hundreds of miles into the woods is hyperbole---even tens of miles is a stretch for a pure dead end road. That being said, the western US has many areas that are mazes of dead end logging roads. While this gives roads that are far from civilization, each of the individual spurs is often quite short (several miles). Similarly, there are more desolate roads than some of my suggestions, but they connect through to civilization at both ends. I have excluded both of these cases, as they seem closer in scope to a question such as "what is the furthest one can be on a dirt road from the nearest paved road?".

  • Kelly Point Overlook on the north rim of the Grand Canyon, extending 28.0 miles from the nearest fork in the road. Even at that point, it is simply a maze of dirt roads in the desert, with another ~85mi to go to the nearest services in St. George, UT.

  • Paradise Campground in Idaho's Selway-Bitterroot Wilderness, 11.7 miles from the nearest fork in the road and another 33.7 miles to civilization. Choosing poorly at the fork (Macgruder Crossing Campground) would instead involve 72 miles of dirt roads with perfect navigation. While there is a ranger station at Paradise Campground, it is only seasonally staffed. This is an interesting example as it defies the oft-repeated advice that "civilization is downstream," when it is in fact upstream (and over several passes). Going downstream from Paradise campground is ~60mi of mule trail to the next dirt road. Corn Creek Campground is similarly isolated.

  • Then end of FS 1013I at 44.627828, -109.785756, to the east of Yellowstone NP near Stinkingwater and Sunlight Peaks. Excluding a handful of exceedingly short spurs (mostly <.1mi, FS1013K the longest at 1.5mi), it is 23.7mi from the nearest fork and another 5.9mi to WY-296, a well-traveled paved road.

erfink
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