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The Nehalem River in Oregon is a popular destination for whitewater enthusiasts. The ideal streamflow range for this river is between 1000-4000 cfs, although it can be run at higher or lower flows depending on skill level and personal preference. The class rating for the Nehalem River ranges from Class II to Class IV, with the majority of the rapids falling in the Class II-III range. The river is divided into several segments, with the most popular being the 10-mile run from Spruce Run Campground to Wheeler. This section features several notable rapids, including Screaming Left, Grey Rock, and the infamous Whorehouse Drop. Other sections of the river include the 13-mile run from Nehalem Falls Campground to Spruce Run, which is primarily Class I-II, and the 8-mile run from Wheeler to Memaloose Bridge, which is Class III-IV.

As with most rivers, there are specific regulations in place to promote safety and protect the environment. The Oregon Department of Fish and Wildlife requires all boaters to carry a valid fishing license, as the Nehalem River is home to several species of fish. Additionally, all boaters must wear a personal flotation device and are encouraged to paddle in groups for added safety. The river is also subject to seasonal closures to protect spawning fish populations, so it's important to check for any restrictions before planning a trip. Overall, the Nehalem River offers a thrilling and scenic whitewater experience for paddlers of all skill levels.