It was our first time white water rafting. Our family of 4 with young children, 8 & 11, had a fabulous time with Arthur. The water temp is around 60F. If you are like me who gets cold easily, I recommend wearing their wetsuit. Meanwhile, my kids were ok in their bathsuit. I felt very safe on the river and Arthur kept us entertained the entire time. Highly recommend this activity in Yellowstone. You will have a great time!