The Wascopam Mission or Dalles Mission was a branch of the Methodist Mission active in the Pacific Northwest. It was the first post established outside the Willamette Valley, opened at Celilo Falls along the Columbia River on March 21, 1838, by Rev. Daniel Lee and Rev. Henry K. W. Perkins.
Lumber for the buildings was cut mostly by neighboring Wascos and the mission was often called Wascopam after them. The mission consisted of a schoolhouse, garden, stable, barn, and two dwellings along with a cleared pasture adjacent to the wood huts used by the Native American villagers. Supplies were procured from Hudson's Bay Company stations Fort Vancouver and Fort Nez Percés along with the Methodist stations of Mission Bottom and later Mission Mill with Chinookan and Walla Walla escorts. During one such trip the provisions for the party had dwindled and a horse had to be consumed until salmon could be purchased from a Clackamas village. The main tribes proselytized to from this location were the Walla Wallas, the Wascos, the Wishram, the Klickitats, the Cascades and the Shastas. Missionaries used Pulpit Rock to preach to the natives and was at first successful in converting some.
Pulpit Rock is a rock about 12 feet (3.7 m) tall in The Dalles, Oregon, United States located at 45°35′44″N 121°11′21.5″W / 45.59556°N 121.189306°W. Prior to Euro-American settlement the rock was carved by natural elements in an open area on a slight slope. The Methodist missionaries were known to preach to the local Native Americans during the 1830s and 1840s from this rock. The rock currently stands in the intersection of 12th and Court streets, directly south of The Dalles-Wahtonka High School, with a historical marker. The city kept the rock at its location in the middle of a street due to history surrounding the rock. A mural on a building in downtown The Dalles features the rock prior to the development of the current roads and neighborhood around it.