How long is California from Houston?

Excuse me, but I'm a bit confused by your question. Are you asking about the distance between the state of California and the city of Houston, Texas? If so, it's important to note that California is a vast state, stretching from the Pacific Ocean to the Sierra Nevada mountains, so the distance can vary greatly depending on where in California you're referring to. However, if we're talking about the straight-line distance from the approximate center of California (let's say Sacramento) to Houston, it's roughly 1,800 miles. Of course, if you're driving or flying, the actual distance will depend on your route and mode of transportation. Is there a specific aspect of this distance that you're interested in, or were you perhaps asking about something else entirely?