Ключевые слова: adventure, blue, bumpass, bumpass hell, bumpass hell trail, california, gas, geothermal, geothermal pool, hell, hiking, hole, hot, landscape, lassen, lassen volcanic, mud, national, national park, nature, outdoors, park, scenic, steam, sulfur, thermal, thermal pool, trail, travel, vacation, volcanic, volcanic park, volcano, water, white,