Former President Barack Obama was reportedly in the Coachella Valley for Presidents' Day weekend, again.

In an undated photo posted Monday on Facebook by Palm Desert resident Gail Bakke-Prosise, Obama appears to be working out at Thunderbird Country Club's gym. The 44th president smiles cheerfully as he poses for the picture.

The Desert Sun has been unable to confirm details of when Obama may have arrived or when he planned to leave.

Desert Sun calls to the Riverside County Sheriff's Department, Democrats of the Desert, Obama's office, Thunderbird Country Club, Rancho Mirage resident and former U.S. Ambassador to Spain James Costos, as well as Bakke-Prosise regarding Obama's presence here, have not been returned.

Despite this, Obama's Presidents' Day trips to the desert, as well as the Where's Waldo-like sightings of him while he's been here, have become somewhat of a local tradition dating back to 2013, when he first came here as president for a summit with Chinese President Xi Jinping at Sunnylands in Rancho Mirage.

More:Trump's surprise visit to Rancho Mirage inspires protest plans and a pro-president rally

Since leaving office, his visits, which have previously included rounds of golf with three longtime friends from his prep school days in Honolulu, have often been unannounced. They only became public after photos of him here showed up on social media.

Whether for business or relaxation, the Obama family's Coachella Valley trips have become so common in recent years they sparked rumors that the former president and first lady were interested in buying a home in the desert.

Ultimately, though, the family settled on a home in Washington D.C.

With this most-recently reported sighting, Obama has likely been in the desert on at least 10 occasions for business or pleasure. The family has often stayed at Thunderbird Country Club.

They've also been known to stay at the Thunderbird Estates home of friends James Costos, former U.S. ambassador to Spain, and his partner, Michael Smith, an interior designer who decorated the White House residential quarters for the Obamas in 2009.

Following his 2013 trip, Obama returned to the valley in February 2016 when he again visited Sunnylands, this time for the ASEAN Summit with Southeast Asian leaders.

On Jan. 20, 2017, following the inauguration of Donald Trump in Washington, D.C., the Coachella Valley was the Obamas' first stop upon vacating the White House.

They arrived at Thunderbird in the evening after a bit of a road trip. Poor weather diverted their flight into Palm Springs and forced them to land at March Air Reserve Base in Moreno Valley.

Six months later, in July, former first daughters Sasha and Malia Obama were spotted having dinner at SO.PA Restaurant in the L'Horizon Hotel & Spa on East Palm Canyon Drive.

East of Thunderbird Heights is Porcupine Creek, the golf estate owned by Larry Ellison, founder of software and technology giant Oracle Corporation. It was one of Obama's previous stops on his visits to golf and meet world leaders in the Coachella Valley.

President Donald Trump is scheduled to attend a re-election campaign fundraising event at Porcupine Creek on Wednesday.

The fundraiser is part of a larger California sweep that has Trump scheduled to appear in Los Angeles, Bakersfield and Beverly Hills. He's departing to Phoenix after the fundraiser for a rally Wednesday evening.

Desert Sun reporter Colin Atagi covers crime, public safety and road and highway safety. He can be reached at Colin.Atagi@desertsun.com or follow him at @tdscolinatagi. Support local news, subscribe to The Desert Sun.