A roughly 26 mile loop connecting several prominent trails in the Great Smoky Mountains National Park (Alum Cave, Boulevard) as well as parts of the Appalachian Trail. See link for description. https://www.hikingproject.com/trail/7026832/great-smoky-mountains-peak-loop.

Fawn Hernandez submitted this 17.7 mile route in Chicot State Park near Ville Platte, Louisiana:

"The most 'Louisiana' trail you will find - with long bridges through cypress swamps, hardwood forest and piney woods. Most of the trail is single track, and not as flat as you would suspect for south Louisiana."

This route has a Strava segment.

This unofficially named hill (around 65 vertical feet in about 0.2 miles) in East Dallas is used for hill training by local runners.  Jonas Roos describes it as follows:

Submitted by Paul Galipeau, this must be one of the most remote routes on this entire site!