The Young Lions Ninja Warrior-style obstacle course is a fun 1-mile course featuring 10 crazy obstacles that kids love! Ages 5 – 17 are welcome to participate. Registration is $20/person. Event organizers strongly encourage pre-registration at YoungLionsOCR.com/denver-2021 Other festival activities are free for the whole family and feature inflatables, interactive booths, cool off stations, and more. Stop by the Young ...