The Lost Forest in Christmas Valley, Oregon

In Christmas Valley, Oregon, a sparse ponderosa pine forest survives in an unlikely place — surrounded by sagebrush, juniper, and other arid-adapted scrub. These trees shouldn't be here. Since the Pleistocene, the climate has warmed and dried, pushing ponderosa forests far to the west. Yet this stand persists over forty miles from any others and thrives on half the rainfall those trees typically need. As Atlas Obscura explains, the answer lies underground: the sandy soil where the pines root sits atop an impermeable clay layer left by an ancient lakebed, which traps rainwater in a near-surface groundwater layer the roots can access. Nearly nine thousand acres of this ecological anomaly were protected as the Lost Forest Research Natural Area in nineteen seventy-two.

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