South of the American River is Wilderness area. After the Americian River and the Bumping merge is tne Naches River. The Naches River and the Little Naches Merge at the FS 19 and Hwy410 intersection and the river is the Naches until it merges with the Yakima River in Yakima. South of the Naches River off the Nile road you can find wheeling on the Cloversprings/Mudsprings Trail. Also in the Glass Creek basin there is wheeling. However if you are more than a light duty wheeler you will be disapointed. Almost all the trails are easy. Stock rigs have no problems.
Thanks bud, There was a write up at NWjeepn.com about some of those trails and some of my club members have been in that area before but it has been years ago. We just thought we would try something different. Thanks for correcting me on the whole river thing I need a good schooling now and again.