We took a detour to see Craters of the Moon National Monument in Idaho, and it was well worth the time. We arrived in the late afternoon, which made for some great light. We hiked to some of the small cinder cones, the large craters, and finally the lava tubes. It was surprisingly cool in the lava tubes—20 to 30 degrees cooler, with a transition space of about 10 vertical feet. The tiny LED headlamps got their first trip use, and they were awesome.
The landscape is stark; mostly dark grey or rust brown, with occasional vivid green vegetation. A constant breeze made it very pleasant.