The Agua Fria River in Arizona is a popular destination for whitewater river rafting enthusiasts. The ideal streamflow range for the river is between 500 and 800 cubic feet per second (cfs). The river is rated as Class II-III, which means it is moderately difficult and has moderate rapids.

The Agua Fria River is divided into two segments for rafting purposes: the upper section and the lower section. The upper section has a length of approximately 14 miles and features several rapids, including Black Rock Rapid, which is a Class III rapid. The lower section is shorter at around 6 miles and is less challenging than the upper section.

One of the main obstacles on the Agua Fria River is the Black Rock Rapid, which is a Class III rapid with a steep drop and a large rock in the middle of the rapid. Other obstacles on the river include small drops, waves, and eddies.

There are specific regulations that apply to rafting on the Agua Fria River. All participants must wear a life jacket and helmet while on the river. It is also recommended that participants have prior whitewater rafting experience before attempting the Agua Fria River.

In conclusion, the Agua Fria River is a popular destination for whitewater rafting enthusiasts in Arizona. It has an ideal streamflow range of 500-800 cfs and is rated as Class II-III. The river is divided into two sections and features several rapids and obstacles, including Black Rock Rapid. There are specific regulations that apply to rafting on the Agua Fria River, including the use of life jackets and helmets.