Overview
The American Discovery Trail Southern Route is the only non-motorized coast-to-coast hiking trail in the United States, running 5,057 miles from Cape Henlopen State Park in Delaware to Limantour Beach at Point Reyes, California. It crosses 15 states and passes through at least 14 national parks and 16 national forests. Heading west, the terrain moves from Atlantic beaches through Appalachian forests, Midwestern prairies, the Rockies, high desert basins, and finally the Pacific coastline.
The southern route is generally considered the better of the two ADT routes and is the one most thru-hikers attempt. It is not a traditional wilderness trail like the PCT or AT, though. Roughly one-third is single-track, another third follows greenways, parks, rail-trails, and open spaces, and the rest is on roads. That mix suits hikers who want cultural immersion and varied terrain more than wilderness solitude. Plan on 15-20 miles per day for 12-14 months to complete the entire route.
Permits & Regulations
No single overarching permit covers the ADT. The trail winds through various national parks, wilderness areas, and protected lands, and some sections require local permits or fees. Popular locations may need permits secured well in advance. Research each segment of your journey carefully, particularly the wilderness areas in Colorado and California, and have all required permissions before departure.
Some sections cross private land and reservations, so stay on trail and respect property rights. In designated wilderness areas, only non-motorized travel (hiking and horseback) is permitted.
Best Season
Most thru-hikers begin in February or March from the eastern terminus, which gets them to the Sierras before heavy snow returns in fall. Early starters should be prepared for winter conditions at Dolly Sods, West Virginia, and for late-season snow in California's Sierra Nevada.
Over 5,000+ miles you will see extreme weather variation. Spring and fall are pleasant in the East and Midwest, while summer heat in the Great Plains and the Nevada desert can be intense. Winter weather can hit the Rockies and Sierras as early as September. Timing is critical: plan the route to avoid desert summer heat and mountain winter snow.
Water & Resupply
Water availability varies dramatically by region and is one of the trail's biggest challenges. Eastern sections generally have reliable water, but the desert stretches of Utah and Nevada take careful planning, with extreme temperatures and scarce sources. Trail angels sometimes maintain water caches in the hardest areas, and resources like Hiking America keep updated water reports covering reliable springs and seasonal sources.
Resupply is excellent for a trail this long. The route passes through numerous towns and cities with grocery stores, gear shops, and essential services, and you are rarely more than a few days from the next one, though desert sections mean longer carries. Many small-town parks let self-powered trekkers camp for one night.
Hazards & Challenges
The ADT has hazards most wilderness trails don't. Road walking exposes you to traffic and to hard surfaces that can cause injury over time. Navigation takes attention: GPX data and turn-by-turn directions are available through Hiking America and the ADT Society, but the route changes constantly as it moves through urban and rural areas.
Desert sections carry real risk of heat exhaustion and dehydration. Mountain sections require winter skills in the shoulder seasons. Wildlife varies by region, from black bears in Appalachia to rattlesnakes in the desert. Between the mixed terrain and the sheer duration, resupply logistics and gear management become skills in their own right.
Getting There
The eastern terminus at Cape Henlopen State Park in Delaware is reachable by bus or car from the major East Coast cities. The western terminus at Point Reyes, California, means traveling to San Francisco and then taking local transportation. Most hikers arrange vehicle shuttles or rely on public transit and rideshares.
Plan your return transportation in advance; after nearly a year of hiking, you will finish a long way from where you started.
Tips
Download the most current turn-by-turn directions and GPX data from the American Discovery Trail Society or Hiking America before starting. These include continuously updated maps, water reports, and notes from previous crossers. Online ADT communities are the way to connect with trail angels and other hikers.
Budget 12-14 months and expect to average 15 miles per day with one rest day per week. Public and private campgrounds are plentiful (most charge fees), and stealth camping and small-town park camping are common. Carry cash for camping fees and small-town resupply.
The ADT rewards flexibility. There is no established trail culture like the AT's, so you end up pioneering your own experience through changing terrain and communities.
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