Dinosaur Ridge - the exposed fossils are amazing to behold. Try to avoid visiting the park during the afternoon of an evening concert, as you may get charged for parking and be asked to leave earlier than you wish.
Mornings are always the best time for outdoor activities.
The mountains have been to known to cause fickle weather patterns, sometimes inspiring afternoon thunderstorms. There are no food sales in the park, but the amphitheater has concessions selling burgers, sandwiches, pizza and snacks during concerts.