Change in the present net value of the timber resources as a result of a wildfire is a promary input into the determination of economically efficient fire management programs. A proceedure was developed to estimate the change inpresent net value of timber outputs, termed here 'net value change.' The timber net value change was then estimated for a large number of hypothetical fire situations in the northern Rocky Mountains to determine how fire situation characteristics affect net value change. Each hypothetical fire situation was described by eight variables: timber management emphasis or objective cover type, stand size, productivity class, slop class, roading, percent mortality, and fire size. The mean net value change varied considerably about these means, however, depending on the value of these variables that describe the fire situation. © Society of American Foresters, Bethesda, MD. Abstract reproduced by permission.