Please don't visit this park. The elephant treatment is awful and the trainers use pick axes and shouting as means to control the elephants.
When not being used to shuttle tourists or in shows the elephants are kept in chains in enclosures.
We were brought to this park by a taxi driver that had offered to take us sightseeing around Chiang Mai. If you do the same, do research the places in advance so you can control the places drivers take you.