In a statement, Moore's family said: "He will be truly missed and never forgotten. The family wishes to express their deep gratitude for all the prayers and support they have received from all the fans, friends and family around the world that Caleb has inspired."
Caleb developed bleeding around his heart and complications involving his brain, his family confirmed to the media.
ESPN, host of the X Games, also released a statement about Moore's death and answered questions about the safety of action sports.
"We are deeply saddened by Caleb Moore's passing and our thoughts and prayers go out to his parents, Wade and Michelle, his brother, Colten, and the entire Moore family. He will be remembered for his natural passion for life and his deep love for his family and friends, and he will always be an inspiration to everyone he touched in the action sports community.
"As a result of this accident we will conduct a thorough review of this discipline and adopt any appropriate changes to future X Games.
"For 18 years we have worked closely on safety issues with athletes, course designers and other experts. Still, when the world's best compete at the highest level in any sport, risks remain. Caleb was a four-time X Games medalist attempting a move he has landed several times previously."