The Middle Of Sec 15, T40S, R4E to Siskyou NF Boundary (East Section Line Of Sec 13, T40S, R4E) whitewater river run in Oregon is a popular destination for rafting enthusiasts. The ideal streamflow range for this section of the river is between 800-1,500 cubic feet per second (cfs), which typically occurs during the spring months.

This section of the river is rated as class III-IV, with a segment mileage of approximately 8 miles. The river rapids and obstacles include Big Drop, which is a class IV rapid, and several other class III rapids such as Pinball and Nugget Falls.

There are specific regulations that must be followed when rafting this section of the river. Rafters are required to wear personal flotation devices (PFDs) at all times, and it is also recommended to wear helmets. Additionally, all rafts must carry a first aid kit and a spare paddle.

It is important to note that this section of the river is located within the Siskiyou National Forest, and therefore, there are specific regulations regarding camping and fires. Rafters should check with the forest service for any current restrictions or regulations.