The objective of this study was to compare pre- and post-fire Landsat TM satellite imagery to determine how much lichen habitat was burned by the 1990-1992 wildlland fires. A 1986 image was compared to a 1999 landcover map generated by Ducks Unlimited and the Bureau of Land Management. Within the burned area, the 1986 image was classified into non-lichen and lichen habitat classes ( 20% lichen cover) using a combination of supervised and unsupervised classification algorithms. Lichen grows slowly so it was assumed that, outside of fire events, the extent of lichen habitat did not change between 1986 and 1999. Thus, lichen habitat remaining in 1999 was added to the lichen mapped from the 1986 image in order to derive a pre-fire estimate for the entire refuge. A total of 267 km2 of lichen habitat burned in the 1990-1992 fires. Lichen habitat comprised 9.1% of the refuge in 1986 and 5.3% in 1999, mostly in the form of open needleleaf lichen (25-60% canopy closure) and woodland needleleaf lichen (10-25% canopy closure) classes. Open needleleaf lichen had been reduced by 1.3% and woodland needleleaf lichen had been reduced by 1.9%. Dwarf shrub lichen was reduced from 0.6% cover in 1986 to 0.1% in 1999 and pure lichen was reduced from 0.2% to 0.1%. Much of the remaining lichen habitat is in an area that has not burned for at least 50 years, according to a statewide fire history map. Refuge managers may want to consider changing this area from a limited suppression prescription in order to retain caribou winter range on the refuge.