In 1926, the city of Philadelphia hosted the sesquicentennial celebration of Independence (150 years).

https://en.wikipedia.org/wiki/Sesquicentennial_Exposition

For this celebration, the US Department of the Interior, (which manages the National Park Service), published postcards featuring photographs of activities available within the parks.

The postcard photographs were published by the Engraving Division of the Geological Survey branch of the Department.

https://en.wikipedia.org/wiki/United_States_Department_of_the_Interior

This postcard, “Public Camping Grounds in Yosemite National Park”, was not mailed.

https://en.wikipedia.org/wiki/Yosemite_National_Park

It may have been collected as a souvenir of the Philadelphia Exposition or as part of a collection of National Park memorabilia.

The great National Parks, established from 1872 and throughout the early years of the 20th century, were widely popular and cherished by Americans.