The visit celebrated the 100th anniversary of the first Winnie-the-Pooh book, which was published in 1926.
Sharing highlights from the outing, the Royal Family said: "Deep in the 100 Acre Wood… The Queen was joined for a game of 'Pooh sticks' on the same bridge where author A. A. Milne played with his son, Christopher Robin."
The traditional game, made famous in The House at Pooh Corner, involves players dropping sticks from the upstream side of a bridge and watching to see whose stick emerges first on the other side.
As Patron of the Royal Literary Fund, Queen Camilla visited the historic woodland to commemorate the centenary of the iconic children's classic.
Ashdown Forest, located around 48 kilometres south of London in East Sussex, welcomed the Queen just hours after Prince Harry arrived in the UK from the United States.
The Duke of Sussex travelled alone, leaving Meghan Markle and their two children, Prince Archie and Princess Lilibet, at their home in California.
Reports have suggested Harry had originally hoped to bring his family with him but decided against it because of ongoing concerns over security arrangements during visits to the UK.
Prince Harry and Meghan stepped back from royal duties in 2020 before relocating to the United States, where they have since built a new life while continuing to make occasional visits to Britain.
