Morialta Falls are located in Morialta Conservation Park a protected area 10 km north-east of Adelaide city centre, in the state of South Australia The conservation park is in a rugged Australian bush environment, with a narrow gorge set with three waterfalls, bounded by steep ridges and cliffs. The conservation park caters to many activities, including bushwalking, bird watching and rock climbing.
Morialta Conservation Park covers 5.33 km² within the Mount Lofty Ranges, which run north-south to the east of Adelaide’s coastal plain. It is bounded by Black Hill Conservation Park on the north, Norton Summit road on the south, the suburb of Rostrevor on the west, and by agricultural land on the east.
The park lies mostly on either side of Morialta Gorge, along the bottom of which runs Fourth Creek. There are three waterfalls on the creek, named respectively First, Second and Third Falls.