Bust out the wacky costume, it's Bay to Breakers day.
Nearly 40,000 runners — from those with an interest in their time to those wishing to win the most creative outfit award — graced the streets of San Francisco Sunday morning for the 106th running of the annual event, which shoots runners more than seven miles from the intersection of Main and Howard Streets to the breakers at Ocean Beach.
The starting gun fired right around 8 a.m. Elite runners ignited out of the gates while fun-minded folks followed behind at a leisurely pace. Superman was spotted at least once, a smiling Fred and Wilma Flintstone pairing made an appearance, and even a mustard-covered hot dog came to life.
Felix Sanchez, dressed as "The Flash," was finished with the race before it even started.
"To be honest, I've been to the finish line a couple of times just to see how they're doing," he joked. "Today alone I've been to Rome to see how that place was doing. (I've been to) Japan; love the culture there. I've been all over the place this morning."
Racers Sport Ingenious Costumes for 2017 Bay to Breakers
Jester-for-a-day Marshall O'Grady also tried his hand at entertaining during his first Bay to Breakers run.
"Well, you know, this whole race is really a joke, isn't it, for 90 percent of us," he said. "So I said, 'Hey, let's dress appropriately.'"
On the more serious side of things, Philemon Cheboi broke the tape at the finish first with a time of 34:48, according to race officials. Buze Biriba paced the women with a finishing time of 39:48.
Participant Mike Domingo didn't necessarily care about his place in the results. The race regular suffered a heart attack 71 days ago. Sunday's event provided an opportunity for some rehab.
"It's not a challenge," Domingo said. "It's something I've always done. It's in my DNA to do it."
The first ever Bay to Breakers race kicked off in 1912, according to race officials. Since that time, creatively-dressed racers have showed off the spirit of San Francisco with a wide gamut of ingenious costumes during the 12K running event.
No alcohol, floats or large bags were allowed in the interest of safety and security. No serious security issues were reported as of 12:00 p.m.