trailfag here, what are the hardest day hikes (done in less than 24 hours) that exist within the contiguous US. Obviously some of these are easier than others and won't take the title of hardest. I'm building a list to do because permits are cringe, and I've done some of these. List should include hikes that have a cool purpose (not just a bunch of retarded stuff added together) and are non-roped, but can be varying elevation gain or distance depending on difficulty or terrain or altitude. Also offtrailed hikes and climbs are welcome. Would really like stuff in the South East cuz I'm living there soon. Try not to include shit that is just parts of the PCT/CDT/AT (NEU8 includes a few of these but they are cool hikes over ranges and stuff).

Include links to maps/routes and descriptions for your recommendations if possible

NE (NEU8):
>Devil's Path
>Presidential Traverse
>Pemi Loop
>Saranac 6
>Cranberry 50
>Mahoosic Traverse
>Taconic Traverse
>Great Traverse
>Catskills 9

SE:
> Black Crest Traverse
> Great Smokeys Traverse
> ITAYG Linville Gorge Grand Loop

Rockies:
> 4 Pass Loop
> Wind Range Traverse
> Barr Trail
> Paintbrush Canyon Cascade Loop
> Gannet Peak
> Windom Peak
> Grinnell Glacier + Highline Trail in Glacier NP
> Little Bear to Blanca Traverse
> Crestone Traverse
> The Bells Traverse
> Mount Wilson El Diente Traverse

Great Basin:
> Zion Traverse
> The Maze
> Grand Canyon Rim to Rim to Rim (r2r2r)
> Arizona Motherlode
> Kings Emmons Ridge 7 13k Peaks

California:
> Whitney Trail
> Cactus to Clouds
> Telescope from Shorty Wells
> Yosemite Valley to Half Done to Clouds Rest to Tenaya Lake
> Sea to Sky to Sea (Cone Peak)
> Ventana Double Cone via Bot


PNW:
> Loowit Trail
> Timberline Trail
> Mount Adams Circumnavigation ("The Gap")
> The Enchantments Traverse
> Seven Devils Trail