Pass Island is the most visited island in the park, simply because Highway 20 crosses it connecting Fidalgo Island and Whidbey Island. A small parking lot is located on the east side of Highway 20 and there is also walkway access on both the north and south bridges.
Next to the parking area is a short, paved walkway to an interpretive sign about bridge history. On nearby rocks, one will find a plaque that describes George Vancouver’s visit on June 10, 1792. A stairway leads to a walkway under the bridge and to other various trails on the island. Please watch your step as most of the trails are not maintained and have loose gravel, rocks, climbs, and cliffs.