)Next, he headed south, exploring the northwest coast, including the outer islands of present-day British Columbia 
Lapérouse sailed between 10–30 August all the way south to the Spanish Las Californias Province, present-day California.He reportedly observed the only historical eruption of Mount Shasta on 7 September 1786, although this account is now discredited He stopped at the Presidio of San Francisco long enough to create an outline map of the Bay Area, "Plan du port de St. François, situé sur la côte de la Californie septentrionale" ("Map of the port of San Francisco, situated on the coast of Northern California"), which was reproduced as Map 33 in L. Aubert's 1797 "Atlas du voyage de La Pérouse".