Forest fire regime of the Bull Run watershed, Oregon

Forest fire history of the Bull Run watershed in northwestern Oregon was evaluated using the natural fire rotation technique. The average NFR over the last 500 years is 347 years, but the record is heavily influenced by a few large events. Fire severity is generally high, with most large fires occurring in summer to fall. Fires that appear to have entered the watershed from its edge significantly influence the historic record. Because the Bull Run receives much more precipitation than watersheds directly north or south, its high-severity fire regime contrasts with the moderate-severity fire regime observed in these adjacent areas.