You can push your mount to achieve great bursts of speed, but doing so tires your mount.
Prerequisite: Ride 5 ranks.
Benefit: As a full round action, you can make a DC 20 Ride check to push your mount to new heights of speeds. If successful, your mount can make 2 run actions as part of this Ride check. Neither you nor your mount may make additional actions or substitute actions when you use this ability, and even if you fail the check, your mount cannot take additional actions. Your mount only suffers the penalties for taking the run action once. After the action is complete, if you succeeded the Ride check your mount becomes fatigued. If your mount is exhausted, you automatically fail this check.