I believe that there are special group tours available but not just a daily show up and get a tour you'll have to contact them about the touring capabilities
There are people there during regular business hours who can talk about the park, show you the good places to go and also teach you how to thow an atlatl!
B.S.U in the summertime has either a professor or Student on the weekends teaching about the Ancient Indian Carvings and Hyroglyphics that are All over there. There is also Maps showing the Trails and Such. It's a Pretty Informative Place. But id call the park if your looking for Anything particular.
Between 10-2pm daily and i think 11 to 3 on weekends
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