The Whitewater River run West Section Line of Sec 31, T12S, R6E to Middle Santiam Wilderness Boundary in Oregon offers a challenging and scenic adventure for experienced kayakers and rafters. The ideal streamflow range for this section is between 800-1,500 cubic feet per second (cfs), which usually occurs during spring and early summer. The class rating for this section ranges from III to IV, meaning that it is suitable for intermediate to advanced paddlers.

The segment mileage for this section is approximately 8 miles, and it includes several rapids and obstacles such as The Gorge, a narrow and rocky section with fast-moving water, and Pinball, a series of drops and boulders that require precise maneuvering. Paddlers should also be aware of the river's sharp bends and blind corners, which can be hazardous at high flows.

Specific regulations to the area include a permit system that limits the number of daily visitors to the Middle Santiam Wilderness. Paddlers are also advised to carry out all trash and minimize their impact on the environment, as the river passes through a protected wilderness area. Overall, the Whitewater River run West Section Line Of Sec 31, T12S, R6E To Middle Santiam Wilderness Boundary offers a thrilling and challenging adventure for experienced paddlers, but caution and preparation are necessary to ensure a safe and enjoyable trip.