How a thin silver thread of a river carved a canyon 2,600 feet deep through solid sandstone — and how that canyon went from an unknown monument with an unpronounceable name to one of the most-visited parks in America. This kicks off the Wildlands Zion trilogy, built the way the land was built: stone first, then the people.

Host Shawn Spainhour, a former Army officer, traces the full arc — the 180-million-year-old Jurassic dune field that hardened into Navajo Sandstone, the uplift and flash floods that let the Virgin River cut the canyon, and 8,000 years of human history layered on top: Archaic hunters, the Ancestral Puebloans and Fremont who farmed and left rock art before vanishing around 1300, and the Southern Paiute who named it Mukuntuweap — "straight up land." Then the Mormon settlers who renamed it Zion, John Wesley Powell's survey, the paintings that made the East want to come, the Park Service's frank decision to swap a Paiute name for a more marketable one in 1918, and the audacious tunnel blasted straight through the mountain.

This is Part 1 of the Wildlands Zion series. Part 2 covers the visit; Part 3 covers where to stay.

Wildlands — know the land before you reach it.

The thin air on a high summit is the single thing most likely to turn a great day into a dangerous one — and fitness won't save you from it. This Field Skills episode is the survival companion to the Great Basin trilogy, built for anyone eyeing Wheeler Peak or any climb above 10,000 feet.

Host Shawn Spainhour, a former Army officer, breaks down what altitude actually does to your body and why a marathon runner can fall apart while someone in cargo shorts cruises past. You'll learn the simple physics of why the air isn't thin — the push is — why acclimatization is genetic and can't be trained, and how to recognize and respond to AMS, HACE, and HAPE before they become emergencies. Then the rules that get you home: climb high and sleep low, hydrate ahead of thirst, skip the alcohol, set a turnaround time in the parking lot, beat summit fever, and read your body (and your partners) every step of the way.

This is a Wildlands Field Skills episode — the survival curriculum that runs between the park series.

Wildlands — know the land before you reach it.

Where to actually sleep at Great Basin National Park — the park with no lodge, no hotel inside the gates, and one of the darkest night skies in the country. This is the practical close-out to the Great Basin trilogy: the campgrounds, the tiny gateway town of Baker, Nevada, and what to do when everything fills up.

Host Shawn Spainhour, a former Army officer, walks you up the mountain campground by campground — from year-round Lower Lehman Creek, to the all-purpose Upper Lehman basecamp, to quiet Baker Creek and primitive Grey Cliffs, to the crown-jewel Wheeler Peak Campground at nearly 10,000 feet (and the honest cold-and-altitude warnings that come with it). Plus how Recreation.gov reservations work, the Stargazer Inn and other Baker beds, the Ely fallback an hour out, and a simple way to choose the right spot for the summit, the cave, or pure solitude.

This is Part 3 of the Wildlands Great Basin series. Part 1 covers the deep history; Part 2 covers planning your visit.

Wildlands — know the land before you reach it.