First lady's parents join President Trump on his first-ever Camp David visit

— -- President Donald Trump and first lady Melania Trump are spending this weekend at Camp David, marking the first time the first family has visited the presidential country retreat.

Joining the Trumps is their 11-year-old son Barron and Melania's parents, Viktor and Amalija Knav, all of whom boarded Marine One on the South Lawn of the White House on Saturday en route to Camp David. The visit coincides with Father's Day on Sunday.

Camp David is located in the wooded hills of Catoctin Mountain Park near Thurmont, Maryland, about 68 miles northwest of Washington, D.C.

"Barron, @Potus and I enjoying beautiful Camp David! #family #sport #weekend," the first lady tweeted Saturday night, along with a photo showing one of the compound's rustic buildings.

Melania Trump's director of communications, Stephanie Grisham, announced Friday night that the first family was heading to Camp David. "THIS WEEKEND: The 1st family heads to Camp David. Hoping everyone has a wonderful weekend," she tweeted.

In advance of the president's visit, the National Park Service said on its website, "Due to increased security measures, portions of Catoctin Mountain Park will be closed effective 9:00 PM, Friday, June 16. Closures are scheduled to continue through Sunday, June 18, 2017 at approximately 5:30 PM."

And the Federal Aviation Administration issued this week a "VIP movement" notice to pilots for the Hagersttown/Thurmont area on Saturday and Sunday.

Instead of spending time at Camp David, Trump has largely opted to spend his weekends at Mar-a-Lago in Florida and Trump National Golf Club in Bedminster, New Jersey.