What started as one of NASCAR's boldest scheduling experiments isn't going away.
NASCAR confirmed Tuesday that it will return to Naval Base Coronado in San Diego in 2027, bringing the Cup Series and O'Reilly Auto Parts Series back to the 3.4-mile street circuit following a sold-out inaugural weekend in June.
But tucked inside the announcement was something potentially more significant.
NASCAR and the U.S. military are working under a multi-year plan that calls for the military-base street racing concept to move to a different U.S. installation in 2028. That means the experiment NASCAR launched at Coronado is beginning to look less like a novelty and more like a new piece of the sport's scheduling strategy.
The 2027 NASCAR San Diego Weekend presented by Anduril is scheduled for July 30-Aug. 1. The O'Reilly Auto Parts Series will race Saturday, July 31, followed by the Cup Series on Sunday, Aug. 1. The Craftsman Truck Series, which participated in the inaugural weekend, will not return to San Diego and is instead scheduled to race at Canadian Tire Motorsport Park in September.
For the Cup Series, it means another run around the 16-turn Qualcomm Circuit constructed through Naval Air Station North Island.
The temporary course winds through an active military installation overlooking San Diego Bay, incorporating streets, tarmac and runways into one of the most unconventional venues NASCAR has attempted. Building it required more than two years of planning and unprecedented coordination between NASCAR and the U.S. Navy.
Initially, there was every reason to view Coronado as a one-off.
The inaugural race weekend was created in conjunction with the 250th anniversary of the United States Navy and the United States' semiquincentennial celebration. NASCAR had already demonstrated an appetite for temporary circuits through the Chicago Street Race, but shutting down portions of an active military base to build a racetrack presented an entirely different logistical challenge.
Then NASCAR actually raced there.
Corey Heim delivered the defining result of the weekend, earning his first Cup Series victory in only his 13th start. Weeks later, he followed it by winning the Brickyard 400 at Indianapolis Motor Speedway, turning his Coronado breakthrough into the beginning of one of NASCAR's biggest stories of the summer.
Austin Hill won the O'Reilly Auto Parts Series race, while Layne Riggs claimed the Craftsman Truck Series event in overtime. The weekend sold out, giving NASCAR enough confidence to commit to a second year.
"What we experienced this year — the incredible racing, the energy from our fans and the partnership with the U.S. Navy and the San Diego community — showed just how special this event can be," NASCAR San Diego President Amy Lupo said in announcing the return.
The second edition will retain much of what made the first unusual.
NASCAR says the Qualcomm Circuit will return largely unchanged, while Navy Community Night is scheduled for Friday, July 30. Sailors and members of the Coronado community will receive free access to O'Reilly Series practice and qualifying along with other activities connected to the Navy and NASCAR.
The Cup race will air on TNT, truTV and HBO Max, while The CW and ESPN App will carry Saturday's O'Reilly Series event. Start times have not yet been announced.
Anduril will also return as entitlement partner for the Cup race, with United Rentals continuing its sponsorship of the O'Reilly Series event. Qualcomm Technologies, Pala Casino Spa Resort and Red Bull remain supporting partners.
Still, the most interesting development may be what happens after NASCAR leaves San Diego.
The multi-year agreement calls for NASCAR and the military to take the concept somewhere else in 2028, although the next installation has not been announced. The stated goal is to bring the event to different military communities around the country rather than permanently anchoring the concept at Coronado.
That fits into a broader period of experimentation with NASCAR's schedule.
In recent years, the sanctioning body has demonstrated a willingness to move beyond the traditional collection of permanent oval tracks. NASCAR transformed the Los Angeles Memorial Coliseum into a temporary short track, brought Cup cars onto the streets of downtown Chicago and then shifted its street-racing experiment west to an active military base in Southern California. The Chicago Street Race will not return in 2027, while Chicagoland Speedway has rejoined the schedule.
The message isn't necessarily that NASCAR is abandoning its traditional venues.
It's that the definition of a NASCAR venue has changed.
A superspeedway can host a race. So can a downtown street grid. So can a football stadium.
Now, apparently, so can a military base.
The decision to bring Coronado back gives NASCAR another year to refine an event that had never been attempted before. Moving the concept elsewhere in 2028 would take the idea another step further, potentially giving the series a rotating showcase event capable of reaching different regions and audiences without permanently occupying another date at a single circuit.
For a sport whose schedule was once remarkably predictable from year to year, that's a significant shift.
Naval Base Coronado proved NASCAR could race somewhere almost nobody would have considered a viable Cup Series venue a few years ago.
Now NASCAR wants to find out where else it can go.
The 2027 NASCAR San Diego Weekend begins Friday, July 30, with Navy Community Night before the O'Reilly Auto Parts Series races Saturday and the Cup Series returns to the Qualcomm Circuit on Sunday, Aug. 1.
NASCAR has not identified the military installation expected to host the concept in 2028.