Final answer:
A contestant can typically practice the barrel pattern before competing to improve performance and ensure safety. Practice sessions help horses and riders get used to the arena and the pattern, but availability may vary by event rules.
Step-by-step explanation:
Yes, a contestant can practice the barrel pattern prior to performance in most barrel racing events. Practice sessions are usually held to allow riders and horses to familiarize themselves with the arena and the pattern. It's crucial for the safety of both the rider and the horse, as well as for improving their performance during competition. Familiarity with the pattern can help reduce anxiety and increase the precision and speed of the run. However, the frequency and timing of these practice sessions can depend on the specific rules of the event they are participating in.