The United States Congress designated the Wenaha-Tucannon Wilderness in 1978 and it now has a total of 177,423 acres. Oregon contains approximately 66,375 acres. Washington contains approximately 111,048 acres. The Wenaha-Tucannon Wilderness is made up of land located in Northeast Oregon and Southeast Washington. Wenaha-Tucannon Wilderness is a maze of deep, rock-walled canyons that cut into what was once a flat and expansive plateau at the northernmost edge of the Blue Mountains. The plateau that has since eroded into long ridge tops and wide, forest-covered mesas that now stand as much as 2,000 feet above the drainages. Following any of these ridges may bring you to a rim wall that falls away vertically into one of the many drainages that flow together in the bottom of the canyons. Most of the water that drains from the Wenaha-Tucannon Wilderness runs south into Oregon's Wild and Scenic Wenaha River, although you will find a few areas where the water runs north into Washington's Tucannon River. The lower drainages are heavily populated with ponderosa pine and the higher elevations are more suitable to lodge pole pine, usually above 4,500 feet, scattered among the lodge pole are some larch, fir, and spruce trees. The highest elevations ere most suited to Sub alpine fir, with native grasses and forbs covering the ground.
Elevations range from nearly 2,000 feet at the Wenaha River up to 6,401 feet at Oregon Butte, the tallest point in the Wenaha-Tucannon wilderness. This rugged terrain, abundant with grasses and water make it prime habitat for the Rocky Mountain elk. This also makes it a prime hunting ground for your successful trophy elk hunt. It is also home to mule deer, white-tailed deer, black bears, coyotes, cougars, bobcats, and snowshoe hares. The elusive Big Horned sheep find this to be one of the best areas to grow a full curl.
Snow falls in the Wenaha-Tucannon wilderness from November through March and accumulates about five feet deep, and you will rarely see it start to thaw before mid April. The Summer months are typically hot and very dry.
There are approximately 200 miles of trail systems staying high on the open ridges, winding and connecting often enough to provide long loops through the Washington side and down into Oregon. Entry points can be found in both Washington and Oregon, with Three Forks, Godman, Troy, Cross Canyon, Hoodoo, Elk Flats and Timothy being the most easily accessed trailhead locations.