This publication provides a list of the lichens collected during the 2008 IAL 6 Field Trip to Point Eeyes National Seashore (PRNS), as well as several additional sites in Marin and Sonoma counties, California, During the IAL field trip 171 species in 85 genera were identified from PRNS and the other northern California locations. A paratype of Lecanora simeonensis, recently described from the area in 2009, was collected at PRNS. Thelotrema petractoides is reported new to California.