Happening this weekend, it is the annual Bay to Breakers race in San Francisco.
Thousands of costumed runners and walkers will be making their way through the heart of San Francisco on Sunday.
Here is the map of the race route:
It will start Sunday morning at Sue Bierman Park and end on the north side of Golden Gate Park.
If you have to drive through that area on Sunday, expect delays because of the large crowds and road closures.
Joining KRON4 on Friday to talk about the race and what to expect on Sunday is Chris Holmes, the general manager of the race.
Watch the above video to see the full report.
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