Since the first AIDS Walk in 1987, more than $74 million has been raised for Bay Area HIV/AIDS service organizations, according to official totals released by organizers.
Total donations collected by this year's volunteers, sponsors and participants will be announced at about 2:30 p.m. at a post-walk celebration at Sharon Meadow, where the 6.2-mile walk begins and ends. More than $3 million was raised at the event in 2010.
Opening ceremony speakers will include San Francisco Mayor Ed Lee, actress Cloris Leachman, and actor Alan Cumming.
Sen. Mark Leno, D-San Francisco, city Treasurer Jose Cisneros and Supervisors David Chiu, Ross Mirkarimi and Scott Wiener are also expected to attend.
The opening ceremony is scheduled to begin at 9:45 a.m., with walkers departing at about 10:45 a.m.
