adjacent Donner und Blitzen River watershed of discharges into Malheur Lake and includes the river portion of the Malheur National Wildlife Refuge. "Alkali Field is located directly south of Malheur Lake, a few kilometers east of the Donner und Blitzen River." The High Desert Wetlands ecoregion is a set of Northern Basin and Range wetlands with in Oregon, including a large area around Harney and Malheur Lakes. History The basin was formed approximately 32,000 years ago when lava flows formed the Malheur Gap, separating the watershed of the basin from the Malheur River, a tributary of the Snake River. Archaeological evidence indicates the basin was inhabited as early as 10,000 years ago. Pollen records indicate that the climate, especially the level of rain and snowfall, has varied greatly since the end of the Pleistocene. Evidence of prehistoric fishing techniques is found at several sites. Evidence suggests that there existed in the basin several species—in particular, the chiselmouth, coarse-scale suckers, and northern squawfish—that are currently found only in the Columbia River basin, indicating that at some point the Harney Basin may have been connected to the Columbia. During wetter years, the lake level of Malheur Lake was raised to a depth of , allowing the lakes to drain over the Malheur Gap. In modern times, however, the lake level does not rise above in the wettest years. In the 19th century, the basin was inhabited by the Northern Paiute tribe. It was explored and extensively trapped by trappers of the Hudson's Bay Company in the 1820s. The basin lay far off the route of the Oregon Trail, but in 1845 experienced mountain man Stephen Meek led an ill-fated party across the basin via Stinkingwater Pass, seeking a shortcut to The Dalles along what has become known as the Meek Cutoff. A total of 23 people died while the party wandered in the basin until finding water at the Crooked River. Because of its climate, it received sparse white settlements and was largely left to the Paiute until the late 19th century. Settlement pressures and conflicts with the Paiute in other areas of Oregon caused President Ulysses S. Grant in 1872 to create a reservation for the Paiute encompassing Malheur Lake and much of the basin. Growing settlement pressures, in particular the discovery of gold in the surrounding mountains, as well as the interest of white settlers to form ranches in the