Threemile Creek is a tributary of the Whitewater River in Oregon that boasts a thrilling river run. The ideal streamflow range for this segment is from 1,000 to 3,000 cfs. The class rating for this segment is class III and IV rapids that offer a challenging experience for intermediate to advanced paddlers. The total segment mileage is approximately 5 miles, and it is completed in around 2-3 hours.

The specific rapids and obstacles present in this segment are numerous and include Tight Pinch, Staircase, S-Bend, and numerous other unnamed rapids. Tight Pinch is a challenging class IV rapid, and Staircase is a popular class III rapid that offers a thrilling experience. S-Bend is a winding rapid that requires good maneuvering skills.

There are specific regulations to the area, which include obtaining a permit from the Oregon Department of Fish and Wildlife to access this segment. Additionally, it is essential to note that boaters should adhere to Leave No Trace principles and practice responsible river use. Overall, Threemile Creek provides an exciting river run for paddlers looking for a challenging experience.