The Grande Ronde River (Lower) in Oregon is a popular whitewater river run with an ideal streamflow range of 800-2,500 cfs. With a class rating of II-III, this segment covers 28 miles from the Minam State Recreation Area to the Powatka Bridge. The river is known for its scenic beauty, diverse wildlife, and multiple rapids and obstacles.

Some of the notable rapids and obstacles in the Grande Ronde River (Lower) include the Boulder Garden, Upper and Lower Blackhorse Rapids, and the notorious Mudslide Rapid. The Boulder Garden is a series of boulder gardens and drops, while the Blackhorse Rapids are a series of technical and challenging rapids that require precise navigation. The Mudslide Rapid is a Class III+ rapid that requires advanced paddling skills and experience to navigate safely.

There are specific regulations to the area, including a permit system for overnight camping and a limit on the number of people allowed per group. This is to maintain the natural integrity of the area and ensure safety for all visitors. Additionally, visitors are required to follow Leave No Trace principles to protect the environment and wildlife.

Overall, the Grande Ronde River (Lower) is a thrilling whitewater experience that offers a challenging adventure for intermediate to advanced paddlers. With stunning scenery and varied rapids, it is a must-visit destination for any whitewater enthusiast.