Are there any dunes to ride in an atv near newport beach?

Not near Newport itself.....but just south in Florence....here is a great drive for you:

.Newport to the Dunes
In the shelter of Yaquina Head, Newport is home of the Oregon Coast Aquarium and the Hatfield Marine Science Center. Yaquina Head features a 125-year-old lighthouse and two unique intertidal areas, one of which is the nation鈥檚 only wheelchair accessible tide pool.

The superb scenery continues through Waldport and Yachats to the Cape Perpetua Scenic Area. Here, you can watch the waves rush in and out of Devil鈥檚 Churn or hike on trails high above it. It鈥檚 not far to picturesque Heceta Head Lighthouse and Sea Lion Caves, the world鈥檚 only mainland viewing area for Steller sea lions.

As the rugged cliffs give way to graceful sand dunes, you鈥檒l arrive in Florence, a city that explodes with wild rhododendrons in spring. Florence is the gateway to the Oregon Dunes National Recreation Area, a 47-mil sandbox with areas designated for bird watching and dune riding. Honeyman State Park is a popular place to water-ski and camp. As you travel on through the dunes, take a side trip to the Dean Creek Elk Viewing Area at Reedsport.

Oregon Dunes National Recreation Area: With more than 31,000 acres, the Oregon Dunes offers something for everyone. You can camp, arrange a tour, take an exhilarating off-highway vehicle ride, walk along tranquil lakes, forest trails and beaches, and much more.

Additional information can be obtained by calling the Oregon Coast Visitors Association at 1-888-628-2101 or checking out the web at www.VisitTheOregonCoast.com You may also contact the Central Oregon Coast Association at 1-800-767-2064 or check out their web site at www.CoastVisitor.com

there should be

Not sure about Newport but just south of Florence there are some great dunes for riding.