Courtesy of the Bureau of Land Management, “Valley of Fires recreation area is located immediately adjacent to the Malpais Lava Flow. Approximately 5,000 years ago, Little Black Peak erupted and flowed 44 miles into the Tularosa Basin, filling the basin with molten rock. The resulting lava flow is four to six miles wide, 160 feet thick and covers 125 square miles. The lava flow is considered to be one of the youngest lava flows in the continental United States.”
They have a very nice campground there and below are some photographs showing some of the features of this area. It is located just west of Carrizzo, NM. One unique feature is the handicap accessible trail which you can see a portion of in the photo below.
This is an image showing more of the Valley of Fires and a portion of the paved trail.
Here is a closer view of a small portion of the lava field.
This image shows the ability of cacti and other vegetation to grow in the lava field.