Forests in many parts of the western United States are now more prone to large, high-severity fire than they were before aggressive fire-suppression efforts, livestock grazing, and poor harvest prescriptions of the previous century. Forest fuels have accumulated and many dry forests have become more dense, with many more small trees growing per acre in the absence of frequent low-to-moderate severity fire. At the Hungry Bob fuels reduction site, part of a national Fire and Fire Surrogate network of experiments across the U.S. during the 1990s and through 2000s, USDA Forest Service researchers tested the application of mechanical thinning and prescribed burn treatments in the ponderosa pine and Douglas-fir forests of northeastern Oregon. Twenty years later, a researcher with the Forest Service's Pacific Northwest Research Station returned and collected more data. He wanted to determine how the different combinations of fire and thinning affected the diameter growth and crown conditions of the residual ponderosa pine and Douglas-fir trees over the past two decades. The researcher found that a combination of thinning followed by a prescribed burn produced the best diameter growth in ponderosa pines, whereas the thinning only units had the best growth for Douglas-fir. The combination treatment produced trees with the highest crown ratios, meaning ladder fuels were reduced. Based on the 20-year responses, the combination treatments produced the best conditions for stand growth, while limiting fire stress upon residual tree crowns.