The entrance fee to the park is $5 cash💰 as parking fee, no credit card is accepted. Tourists usually walk from the north rim of the interpretive center to the bottom of the valley, cross the suspension bridge, and then climb up from the south rim to take a loop, so-called Rim to Rim. The difficulty is that you have to go up and down 620 steps. I've seen people have difficult halfway, so there is a warning sign at the starting point marked it as strenuous . It’s actually not that hard as it sounds, for those who exercise regularly won’t have a problem.
Something unexpected happened today. Since I have been to this place many times, so I went down to the suspension bridge at the bottom of the valley directly. However, someone blocked the walk up stairs to the south rim. When I asked, I found out that now is the 10-day white water rafting season. The stairs at the southern rim are opened only to white water rafters, allowing them to carry their kayaks down the stairs to the starting point of the rapids. I was told that more than 290 people were rafting yesterday, so tourists could only go back the same way. After going back up, I still insisted on walking to the south rim to see these rafters. It looks like these enthusiasts is so happy that it feels like a rafters festival, some one even did it twice or three times today. According to some of them, the rapids level here is 3 to 4, and may reach level 5. Outlook 9 is best spot to look, I could clearly see how they entered the rapids, it is fun just watching them.