Run
You can run as a full action. When you run, you can move up to four times your speed in a straight line. You gain the flat-footed condition, and you can’t run if you must cross difficult terrain or can’t see where you’re going. Running provokes attacks of opportunity (see below). You can run for a number of rounds equal to your Constitution score. See page 258 for information on long-distance running.
Source
Core Rulebook pg. 248