he Wallowa Mountains have a fascinating geological history. The peaks and ridges consist of volcanic and sedimentary rocks that later included granite, the white granite of the Matterhorn summit you see in this image. During the Ice Age, nine large glaciers, each more than ten miles long, cut through the Wallowas. The long, narrow rivers of ice formed the deep valleys typical of the Wallowas, and shaped the sharp ridges and pyramid peaks.Today the range has seventeen summits over 9000 feet in elevation with the tallest named after Sacajawea, the famed guide for the Lewis and Clark expedition. Sacajawea, Matterhorn, and many other 9000+ summits offer some of the best technical and nontechnical climbing in Oregon. You'll also find hundreds of miles of trails throughout this magnificant high country.
