Burney falls is located in northern California near redding. Admission when I went, 6-7-15, was $8 for a day pass I believe you can stay until sunset. They also have camping options available. When you drive in they first have a info center where you can watch a video to learn about the history of the falls they also have displays to show you the types of wildlife and plant as well as the types of equipment that people used to use when the first settled there.
Behind that they have the bathrooms and the general store which has everything clothes, camping supplies, fishing supplies, a gift shop, and groceries.
As for hiking we started falls loop which takes you to the base of the waterfall, and at the base you can go to the water fish, swim, whatever you want, from the base you follow the path to a nearby bridge cross it then head up the side of the cliff to the top of the falls you can cross another bridge to end the hike for a total of about 2 miles or like we did we turned at the fork in the part labeled pacific creek continued along for about 1.5 miles to the lake bed that supplies part of the water to the falls, during our trip the creek was dried up, from there we crossed a bridge putting us back on the original side and hiked back to the falls a total of about 5 miles.
As for the terrain the falls loop is handicap accessible but once you go down pacific creek trail its a little more rough but still flat. Its an easy hike for beginners and the views are beautiful.