Did some exploring in La Barge canyon as we hiked to the lower box from the Canyon Lake trail head. Located the Aylor's Cabin (thanks Wally for the shared information) and the Spanish Cross cave. Went past the lower box a short way and had lunch, then made our return back to the TH. GREAT trip.
A campfire must be extinguished by drowning it with water, stirring with a shovel, and repeating that process until the campfire is cold to the touch. A campfire is still a danger if it has any trace of heat, and must not be left or abandoned. Wildfires can begin by abandoned campfires that rebuild heat on windy days and then blowing embers ignite surrounding grasses and brush.