The Cedar Grove Botanical Area in Eastern Oregon's Aldrich Mountains covers about 26 acres and contains the only isolated stand of Alaska yellow cedar east of the Cascades in the United States. This grove is located on the northeast slope of Aldrich Mountain at the head of Buck Cabin Creek on the Blue Mountain Ranger District. This species is normally found at scattered locations in the Cascades and along the north Pacific coast. Experts believe that during pre-glacial times in Oregon, the climate here was much cooler and more humid. At that time, perhaps during the late Pleistocene, this stand may well have been part of a contiguous stand of cedar. Because of the unique combination of weather, moisture, and other conditions in this one isolated spot, this small stand survived changes to hotter, drier weather. Most areas converted to ponderosa pine and the other trees we see in eastern Oregon today. The cedar grove offers a cool, welcome respite from the heat of a hot, desert-like summer day.
The cedar grove is located along a very wet area of springs and seeps and is found amid a larger stand of true firs and Douglas-fir trees, along with some ponderosa pine and western larch. Dark and cool, it is fairly open un
