If you happen to be in New Mexico, youre not far from a great hiking or backpacking trail or area. A couple of top spots include Carlsbad Caverns National Park and Chaco Culture National Historical Park.
Trails.com — browse thousands of hiking trails and unlimited topo maps. You can try it for free.
AllTrails has a trail finder feature where you can search for just the right place to go this weekend.
Gorp has a great list of places to go as well as tips and guides.