I-84 is a necklace worn by Oregon strung with ecoregions from east to west. The northern-most boundaries of five ecoregions dangle from the Interstate: Blue
SNAKE RIVER PLAIN: Burley, ID to Farewell Bend, OR Location: Located primarily in southern Idaho and extending a short distance into Oregon near Ontario.
NORTHERN BASIN & RANGE: Utah Border – Rupert Location: This region is arid, gently sloping, drier and less suitable for agriculture than the Columbia Plateau or
CENTRAL BASIN & RANGE: Toquerville – Idaho Border Location: The Central Great Basin region occupies a large portion western Utah. Climate: The ecoregion has a
COLORADO PLATEAUS: Toquerville-Zion National Park Location: Located between the Southern Rocky Mountains on the east and the Wasatch Range to the west, the region occupies
MOJAVE BASIN & RANGE: St. George – Hurricane Location: The Mojave Basin and Range is located in southeastern California, southern Nevada, southwestern Utah, and northwestern