Escape from Alcatraz is the name for two different triathlon

Triathlon

A triathlon is a multi-sport event involving the completion of three continuous and sequential endurance events. While many variations of the sport exist, triathlon, in its most popular form, involves swimming, cycling, and running in immediate succession over various distances...

s held in the San Francisco Bay Area

San Francisco Bay Area

The San Francisco Bay Area, commonly known as the Bay Area, is a populated region that surrounds the San Francisco and San Pablo estuaries in Northern California. The region encompasses metropolitan areas of San Francisco, Oakland, and San Jose, along with smaller urban and rural areas...

 of California

California

California is a state located on the West Coast of the United States. It is by far the most populous U.S. state, and the third-largest by land area...

. The Escape from Alcatraz originated in 1981 as a private club event, beginning in San Francisco and ending in Marin County

Marin County, California

Marin County is a county located in the North San Francisco Bay Area of the U.S. state of California, across the Golden Gate Bridge from San Francisco. As of 2010, the population was 252,409. The county seat is San Rafael and the largest employer is the county government. Marin County is well...

. The race split in 1983 with a separate commercial event open to the public, which is now an aquathlon

Aquathlon

The sport of aquathlon consists of a continuous, two-stage race involving swimming followed by running. The International Triathlon Union and its member federation organizations sanction competitions and govern the sport...

 (having dropped the biking section of a traditional triathlon) held on a shorter course entirely within San Francisco.