Red Rock canyon is a nice short ride. A longer ride north to Zion National Park would be outstanding. A ride to Death Valley National Park is also fun unless it's summer. If it is summer and your looking for a cool one day ride go to Mt. Charleston and have lunch at the restaurant in the Mt. Charleston Lodge. Fun place to go hiking as well. Hoover Dam has a very nice tour of the inside of the dam that's fun. Your also close enough to go to The Grand Canyon. If your looking for dirt roads to explore you'll need to wait for others to comment.