The 34th Escape from Alcatraz Triathlon begins Sunday, June 1 at 7:30 a.m. with a 1.5 mile swim from a barge off of Alcatraz into the beach next to the St. Francis Yacht Club followed by an 18-mile bike ride through Golden Gate Park and an 8-mile run through San Francisco.
Some 2,000 triathletes and relay teams from 45 countries are scheduled to compete.
[RELATED: New champions crowned at Alcatraz race]
The Rock is home to the first west coast lighthouse and was originally a U.S. Army fort and prison from 1850-1934 before its 29-year tenure as a famous maximum security penitentiary. It was occupied by American Indians in 1969 and is currently operated by the National Park Service.
Here are some of the storylines to keep an eye on at tomorrow's event:
New Zealand's two-time Olympic medalist Bevan Docherty, who recently won the Texas Ironman, is among the top competitors this year.
New Balance triathlete and reigning Ironman world champion Mirinda Carfrae will participate for the first time.
Jim Oury, a 76-year-old retired surgeon, is making his fourth consecutive triathlon appearance.
After a five-year break, San Francisco's Nelda Williams, 65, looks to set a a new record in the 65-69 age bracket.
Attorney and former Georgia basketball player Tom Withers, 57, is up for another challenge in tomorrow's race.