Nevada Rafting Trips
While Nevada is known for many things, rafting is not one of them. The Truckee River is an option. However, most of the rafting near Nevada is in California. Many of the most popular rafting trips in the country are only a couple hours from Reno.
If you're looking for river trips near Las Vegas, then the Colorado River near the Grand Canyon is for you. AllAboutRivers has more information about other rafting trips in Arizona as well.