Arco is a small city in Butte County, Idaho, with a population of under a thousand residents. The climate is arid with hot summers and cold winters. Arco is located near the Big Lost River, which is an important source of water for irrigated agriculture. The hydrology constituents in Arco include high levels of nitrates and phosphates due to agricultural runoff. The city is surrounded by stunning natural landscapes, including the Craters of the Moon National Monument, which offers unique volcanic formations and hiking trails. Outdoor recreation opportunities in the area include fishing, hunting, camping, rock climbing, and hiking. Arco is a great destination for those looking to enjoy the beauty of nature and a slower pace of life.