Yosemite was a planet in an unspecified planetary system, first explored and settled in the Amerikano era of interstellar colonisation.
While "Tanner Mirabel" was investigating on Yellowstone after his arrival to the planet, he asked Quirrenbach on his origins, with Quirrenbach claiming to be from Grand Teton. Mirabel then mentioned in his inner monologue that he had heard of the planet, along with other old Amerikano colonies, such as Yosemite, Glacier, Yellowstone itself and "two or three others he couldn't remember".
- Chasm City (2001) - mentioned in passing
- The planet's name is based on Yosemite Valley in the Sierra Nevada mountain range of central California, home to the famous Yosemite National Park. Like many planet names from the Amerikano era of interstellar colonisation, it references North American geography, often scenic locations.
- The planet seems to be at least somewhat settled, given the mention in Chasm City of the "Fand-Yellowstone-Grand Teton run" being a lucrative lighthugger trade route.