The Snake River Plain cracks a smile across southern Idaho. It curves down from the Centennial Mountains on the east toward Nevada, then turns up northwest toward Oregon. I followed the Plain to Boise a decade ago to work as a federal ecologist, one of thousands of new Idahoans flooding the Plain and loving it to death.
The hot spot that now powers the geysers of Yellowstone poured the Plain’s foundation. As the Ice Age thawed, Lake Bonneville escaped down the Snake River. The megaflood blasted out house-sized chunks of lava and cut laugh lines into the Plain.
Serene mountains outline the edges of the smile and help me navigate unpaved roads on the sagebrush desert. My car kicks up silt that nearly matches its Champagne Gold paint.
Formed from fire and shaped by water, the Plain is dominated by wind in spring. This is when I study the effects of federal vegetation improvement projects on sage grouse habitat. In less disturbed areas, sagebrush is skirted by duvets of plush moss, attended by native grasses, and dotted with purple larkspur and lupine. In summer, yellow rabbitbrush shines. The grouse and I startle each other when I walk too close to where they hide from legal battles over the status of their species.
In more disturbed areas, ragged cheatgrass spears up among the native plants, ready to carry wildfire. The cheatgrass coalesces into scabs after fire removes the sagebrush. Much of the lower elevations have been scabbed over.
Sterile green bandages of non-native wheatgrass plantings protect against the invasive cheatgrass. The plantings fade to monochrome gold in summer.
Sage grouse congregate among more recent lava flows around Craters of the Moon. The flows are impossible to plow, so settlers did not sink roots into the lava. It is tough on boots, tires, and hoofs, which leave the land to the grouse. I conclude that sage grouse would benefit from the application of more lava. The Craters operate on a longer time frame than federal funding cycles, but an eruption is due.
I worry about the Plain. The Plain cracks a smile.