[myared]

Happy that my hometown of Louisville, KY is partially finished with building out a ~110 mile bike (and walking) loop that circles the city by connecting existing parks and creating new ones. I can't think of anywhere else in the US where a cyclist could a century ride without having to deal with automobiles.

It's called the Louisville Loop.

https://en.wikipedia.org/wiki/City_of_Parks

[altcognito]

Michigan has a boatload of trails - These are all broken down sectionally. Many of them connect so you could easily build a 150+ mile trek.

http://www.traillink.com/state/mi-trails.aspx

Ohio is finishing up a 325 mile pathway. http://ohiobikeways.net/swregionlist.htm#swohiotoerie

[thrownaway2424]

That is a spiffy facility, but it takes another kind of political fight to build bike lanes or dedicated bikeways in the city center where people actually want to go.

[angdis]

It is very nice to have separated bike lanes, but they're of limited utility if they don't connect useful transportation endpoints (eg residential, commercial, recreational).

[baddox]

> I can't think of anywhere else in the US where a cyclist could a century ride without having to deal with automobiles.

I assume you mean in or near cities. There are several long-distance bike-only trails (that I know of) in the US, but they tend to be in protected nature areas.

[dalke]

The 185 mile long Chesapeake & Ohio Canal bike path connects to the 150 Great Allegheny Passage bike path, giving a 335 mile long bike-only trail between D.C. and Pittsburgh.