OREGON — A coalition of environmental groups and activists are attempting to stop the U.S. Bureau of Land Management from allowing old growth trees to be logged in southern Oregon by waging a complaint in court and sitting in trees slated to be cut. On Monday, activists from the environmental group Pacific Northwest Forest Defense climbed high into several Douglas fir trees in a 10,000-acre forested area near Grants Pass. The bureau has sold more than 2,200 acres in it to six companies to log. Activists say some of the trees due to be harvested are up to 400 years old. …Sarah Bennett, a spokesperson for the bureau, said it is rare for officials to allow the sale of acreage with old growth trees and that environmental assessments have shown both contested harvest areas are low-risk for habitat destruction. George Sexton, conservation director of Klamath-Siskiyou Wildlands Center, said the bureau is being dishonest.