Proceeding north, Portolá mostly followed the coastline (today's Califonia State Route 1), and was prevented from going farther north by the entrance to San Francisco Bay, the Golden Gate.
Proceeding north, Portolá followed (as much as possible) the coastline (today's California State Route 1), except where forced inland by coastal cliffs. Eventually, the expedition was prevented from going farther north by the entrance to San Francisco Bay, the Golden Gate.