From https://www.sheltoweetrace.com/:

The Ice Age National Scenic Trail winds for over 1000 miles though rural Wisconsin, from St. Croix to Potowatomi Park at Sturgeon Bay. The Ice Age Trail Alliance "protects, promotes, builds and maintains the Ice Age Trail", in cooperation with the Wisconsin Deptartment of Natural Resources, the National Park Service, and local governments and private landowners.

The SHT has changed dramatically over the last dozen years.
Below we discuss evolution of the trail and FKTs.

The Superior Hiking Trail runs "310+" miles following the NW shore of Lake Superior in Minnesota. It is a beautiful and rugged, mostly single track trail. The Superior Sawtooth 100 mile race, and a couple of shorter races, use this trail.

"maclay" posted to our old website (5/30/2017):

Lake Scott State Park is my local state park and trails. This Saturday, June 3, I plan on establishing a time for a set of parameters that I hope will be a fun trailrunning experience for anyone wanting to see western Kansas. LSSP is about 40 miles south of I-70, so anyone crossing Kansas who wants to get in a fun run is welcome. Here is what I'm suggesting for the parameters for anyone wanting to have a go at setting a time. 

The Womble Trail is a 37-mile trail in the Ouachita National Forest in Arkansas. It runs parallel to, and eventually joins, the Ouachita Trail.

The BRO trail loosely parallels Bull Run (the stream) in western Fairfax County, VA, running ~18 miles from Bull Run Regional Park to Fountainhead Regional Park. Maintained by the PATC. Anyone have FKTs for this?

I know the Virginia Happy Trails Running Club (VHTRC) holds their annual 50 miler on this trail, but seems like the purest FKT for this would be to time a single length from one terminus to the other (either direction).

www.patc.us/hiking/destinations/bull_run.html