Who made up the major travelers in California Trail before Gold Rush?

Before Gold Rush, the major travelers in California Trail were:

- Early explorers like Jedediah Smith and Peter Skene Ogden.

- Fur trappers and traders from the North West Company and the Hudson's Bay Company.

- Missionaries from the Catholic Church and other denominations.

- Settlers from the Midwest and the Eastern states.

- Groups of Mexican citizens or Californios who lived in California and those in what was then Mexican territory.