McKenzie Pass, elevation , is a mountain pass in the Cascade Range in central Oregon in the United States. It is located at the border of Linn and Deschutes counties, approximately northwest of Bend, between the Three Sisters to the south and Mount Washington to the north. Oregon Route 242 goes over the pass. At the summit of the pass, Oregon Route 242 crosses a lava flow just west of Sisters. Surrounded by lava, the Dee Wright Observatory was constructed in 1935 by Civilian Conservation Corps workers and named after their foreman. Visitors climb to the observatory to view the Cascade peaks visible from McKenzie Pass. Also near the summit is Clear Lake, a renowned location for fresh-water diving. Highway 242 is not recommended for large trucks, trailers or motor homes due to numerous tight switchbacks. The pass is closed from November to July due to snow. The pass is named for Donald McKenzie, a Scottish Canadian fur trader who explored parts of the Pacific Northwest for the Pacific Fur Company in the early 19th century. Astronaut training Parts of central Oregon were used as a training grounds for Apollo astronauts between 1964 and 1966. The astronauts would practice walking on terrain that was similar to the surface of the moon. In August 1964, Walter Cunningham struggled in a lava flow at McKenzie Pass, where he eventually fell and tore his space suit. Cunningham piloted the lunar module on Apollo 7 in 1968. See also McKenzie Bridge, Oregon McKenzie River (Oregon) References External links Gerald W. Williams, McKenzie Pass at The Oregon Encyclopedia Cascade Range Mountain passes of Oregon Mountain passes of the Cascades Transportation in Deschutes County, Oregon Transportation in Linn County, Oregon Landforms of Deschutes County, Oregon Landforms of Linn County, Oregon Deschutes National Forest Willamette National Forest