Depending on when you'll be in town, maybe you could ride part of the way home on this trip:
http://elcova.com/groupee/forums/a/t...1/m/8441071251
No matter how easy the trail, it's not wise to go off-road alone. If you go with others that have experience, they'll coach you through things if the going gets dicey.
When are you coming to town?
To answer your question, check out the Desert National Widelife Refuge. The Mormon Pass Trail is easy and very scenic. The DNWR is a few miles north of Vegas. The mountains you see on the north end of the Vegas Valley are the south end of the Refuge.