Modoc County, in the northeast corner of California, is roughly the size of Connecticut. It's so sparsely populated that the entire county has just one stoplight. The nearest Walmart is more than an hour's drive, across the Oregon border. Same with hospitals that deliver babies.
Greta Elliott runs a tiny health clinic in Canby, on the edge of the national forest. "Rural" doesn't begin to describe the area, she says. This is "the frontier."
"There are more cows in Modoc than there are people," Elliott says.