On Thursday, the triathlon begins and there are two San Diegans who will be in the field of competitors.
Billington, 27, and Maloy, 30, moved to San Diego and quietly go about their business training for the world class competition in the middle of suburbia.
A typical day includes a three-mile swim, an eight to 10-mile run, and a two hour bike ride, with lots of physical therapy along the way.
See results from today's competition here.
The top-ranked U.S. women's volleyball team lost in the semifinals Thursday in a fierce battle with Serbia.
Lowe, a Rancho Santa Fe native, competed in tennis when she attended La Costa Canyon High School. Students of Fallbrook High School will recognize Lloyd's name from her time as an athlete there.
The team will compete for a chance at the bronze medal on Saturday.
Paris Henken and teammate Helena Scutt secured a spot in the medal race for Women’s 49er FX. However, it was not to be. The Coronado High School graduate finished the medal race in 9th place to end her first Olympics in 10th overall.
Fellow U.S. Sailing and San Diego Olympian Briana Provancha raced for the gold Thursday in the women's 470. However, Provancha and teammate Annie Haeger finished in 7th place.
Crouser beat Kovacs with an Olympic-record heave of 22.52 meters that topped Kovacs' 21.78. New Zealand's Thomas Walsh got bronze.
Kovacs lived and trained at the Olympic Training Center (OTC) in Chula Vista, California before heading to the 2016 Rio Olympics.
Crouser spent some time training at the Chula Vista OTC as well.
Darrell Hill, another shot put athlete who trained at the OTC facility in San Diego's South Bay also competed in qualifications Thursday morning. He ranked 23rd with a distance of 19.56m. Hill did not advance to the finals.
In the BMX quarterfinals Thursday, all of the men on Team USA advanced to the semifinals. Connor Fields finished in second place after his heat with eight points and Corben Sharrah third in the same heat with nine points. Lakeside's Nic Long finished third in his heat with 10 points. All move on to the semifinals.
Watch the men's quarterfinal recap here.
For updates from the 2016 Rio Games, including profiles of San Diego athletes, visit our Olympics section here.