Gran Moraine takes its name from cataclysmic floods that occurred in the northern Willamette Valley of Oregon during the last ice age. As the glaciers receded they released a torrent of water from the once giant Lake Missoula. These famous Missoula Floods traveled across the Columbia basin helping to carve out the Columbia Gorge.
The Willamette Valley became an extremely large temporary lake and was left with huge deposits of silt as well as giant boulders with origins in current British Columbia and Idaho. These are known by geologists as erratic rocks. These erratic rock outcroppings boldly manifest themselves throughout our vineyard. They were once part of the giant glacial dam’s moraine – what we refer to as the "Gran Moraine."