Lassen Volcano National Park is about 350 miles away from Yosemite National Park. I would recommend visiting these two brilliant parks on different days as both have a lot to offer.
At present, eight: Channel Islands, Death Valley, Joshua Tree, Lassen Volcano, Pinnacles, Redwood, Sequoia / Kings Canyon (administered as one park), Yosemite.
The one in Washington is 961 miles from Yosemite.
about 200 miles
141 miles
834 miles
765 miles
650 miles
281 miles
Nearly 1200 square miles
400 miles
Bishop, California is 139 miles from Yosemite National Park.
Yosemite National Park's area is 1,189.6 square miles.