If I had to nominate a single, definitive marathon swim of San Francisco Bay, it would be the Round-Trip Angel Island.
Start at Aquatic Park’s “swimmers’ beach” between the South End and Dolphin clubs, swim out into the Bay, past Alcatraz to Angel Island (3.5 miles), around the island (3 miles), and then back to Aquatic Park (3.5 miles). Ten “honest” miles by shortest route, mostly perpendicular to the tidal flow.
Angel Island is the second largest island inside the Bay (behind Alameda), and has functioned at various times through history as a military fort, an immigration station (like a west coast Ellis Island), and currently as a California State Park.
The Round-Trip Angel Island (RTAI) is like the Round-Trip Alcatraz (RTA)…squared — almost literally, by distance. The 3.2-mile Round-Trip Alcatraz is an annual South End club swim — and Water World Swim organizes a popular public version called the “Swim Around the Rock.” A RTAI swim involves many of the same features and challenges as a RTA: scenic views, iconic landmarks, complicated currents, and busy shipping channels — requiring skill from both the pilot and swimmer.…