Like most of Oregon and Washington south of Puget Sound<\/a> into the Willamette Valley<\/a> the landscape and climate of Clark County are determined by its placement between the volcanic<\/a> Pacific Coast<\/a> and Cascade Ranges<\/a>, where glaciation<\/a> helped form a U-shaped valley which meets the river valley of the Columbia River as it leaves the Columbia River Gorge<\/a>. Volcanic andisol soils<\/a> are common, with fertile mollisols<\/a> in the lower areas. The central and southwest areas of the county are generally flat floodplains, sculpted by torrents of prehistoric Lake Missoula<\/a>. A series of dramatic floods known as the Missoula Floods<\/a> took place 15,000 – 13,000 years ago, as several ice dams melted, forming a series of low steps such as the “Heights”, “Mill Plain”, “Fourth Plain” and “Fifth Plain”. Clark County’s K\u00f6ppen climate classification<\/a> is “Csb.” (From Wikipedia on Clark County)<\/p>\n <\/p>\n Counties: Cowlitz, Clark, Lewis, Pacific, Skamania,\u00a0Wahkiakum County<\/span><\/p>\n Features: Termination of the Columbia River, Cape Disappointment, Long Beach Peninsula, Mount Saint Helens,<\/p>\n\n\t\t\t Candela Citations<\/h3>\n\t\t\t\t\t