This report describes use of increment borers for interpreting fire history in coniferous forests. These methods are especially useful in wildernesses, parks, and other natural area where fire history is needed for fire management planning, but where sawing cross-sections from fire-scarred trees in undesirable or prohibited. The techniques presented here can be used to estimate fire years and the length of fire intervals with accuracy sufficinet for many needs. Methods described include combinations of scar boring, face boring, and back boring to date individual fire scars; calculations of mean fire intervals for trees with multiple fire scars; and age-class sampling to characterize the effects of past fires on stand structure and composition. The report discusses selection and layout of study areas and the collection and analysis of samples. The authors tell how to estimate frequency, intensity, and size of fires.