This is some trivia that are many are not aware of. While these national parks are uniquely different, for a time they were joined at the hip, In 1916, President Wilson signed a bill that created Lassen Volcanic National Park. It was California Congressman John Raker that lobbied with due diligence to create the park. While Congressman Raker’s bill passed and signed by Wilson, it was in name only. One of the drawbacks of the bill was the lack of funding. Congress, in its bill, only allowed $5,000 annual funding for the park. Due to its lack facilities, remoteness etc., for administrative  purposes Yosemite National Park was placed in charge as  the overseer of Lassen. The arrangement lasted nearly a decade.

Tim

P.S. As sacrilegious as may be sound, this California native has not been to Yosemite