[2] The Guadalupe Cave Survey, explorers at Carlsbad Caverns National Park, New Mexico, became part of CRF in 1971.
[2] Starting with Mammoth Cave National Park, CRF work has primarily focused on United States federal lands---particularly within United States National Parks.
Thus, its membership draws experienced cavers, particularly those interested in cave surveying and cartography.
It is perhaps the world’s largest publisher of books on caves, karst, and speleology.
Cave Books is staffed by volunteers, and the managing editor is Elizabeth Grace Winkler.