Spencer Butte is a prominent landmark in Lane County, Oregon, United States, described in the National Geodetic Survey as "a prominent timbered butte with a bare rocky summit" on the southern edge of Eugene, with an elevation of 2,058 feet. Spencer Butte is accessible from Spencer Butte Park and has several hiking trails to the summit. The tree cover on the butte is predominantly Douglas-fir, however the butte is treeless at its summit.