@LindaAnn
As requested:
Here's a list of 30 of the most difficult hikes in America, each with a distance of less than 30 miles:
The Presidential Traverse, New Hampshire - ~23 miles
Kalalau Trail, Hawaii - 22 miles (one way)
The Maze, Utah - Varies (off-trail, less than 30 miles)
Cactus to Clouds, California - ~16 miles
Longs Peak, Colorado - ~15 miles (Keyhole Route)
The Knife Edge, Maine - ~2 miles (part of the Appalachian Trail)
Angels Landing, Utah - ~5 miles
Grand Canyon Rim-to-Rim-to-Rim, Arizona - ~23.5 miles
Wonderland Trail, Washington - ~93 miles
Guadalupe Peak, Texas - ~8.4 miles
The Enchantments, Washington - ~18 miles
Mount Whitney, California - ~22 miles (Mount Whitney Trail)
The Wind River High Route, Wyoming - Varies (off-trail, less than 30 miles)
Half Dome, California - ~14 miles (via Mist Trail)
Zion Narrows, Utah - Varies (up to 16 miles round trip)
The Hayduke Trail, Southwest U.S. - Varies (off-trail, less than 30 miles)
Mount Rainier, Washington - Varies (depends on route)
Highline Trail, Montana - ~7 miles (Logan Pass to Granite Park Chalet)
The Franconia Ridge Loop, New Hampshire - ~8.2 miles
The Colorado Trail, Colorado - ~28 miles (Segment 5)
Maroon Bells-Snowmass Wilderness, Colorado - Varies (depends on route)
Pemi Loop, New Hampshire - ~31 miles (includes part of the Appalachian Trail)
Mount St. Helens, Washington - ~9 miles (Monitor Ridge)
The Florida Trail, Florida - Varies (off-trail, less than 30 miles)
The Great Smoky Mountains Challenge, Tennessee/North Carolina - Varies (depends on route)
Olympic National Park, Washington - Varies (depends on route)
The Lost Coast Trail, California - Varies (depends on route)
Windward Wall, Alaska - Varies (off-trail, less than 30 miles)
Mount Washington, New Hampshire - ~8.4 miles (Tuckerman Ravine Trail)
The Uinta Highline Trail, Utah - Varies (depends on route)