Much of Cusatia County is mountainous, and is dominated by various peaks known for their varied flora and fauna. The county has multiple peaks of over 5000m altitude, and eight of over 6000m, including the FSA's highest, Mount Pinkani (6708m). Two volcanoes, Kibsy and Tunicawi, are located within the state, though none have erupted in the period since Castellanese contact.
The county was formed in 1872 at statehood. In 1976, the more populous southwestern portion of the county was split off to form Los Valles County.
Rosalie and Huntington are the two largest towns in the county; Huntington is the county seat. A lot of indigenous communities can be found in the central and northern portions of the county. Huntington is the highest city in the FSA, at about 4300m above sea level. The small indigenous settlement of Tumbaca is perhaps the highest altitude community in the FSA, at around 5000m above sea level. Many of the communities in the mountains are poor mining towns, where the miners get paid very well due to the dangerous conditions but the towns lack in many social services.
Huntington has a population of 9400 and is the county seat. Huntington is the oldest continually-settled town, dating to the 17th or early 18th century as a religious center. Huntington sits at an elevation of around 4300m above sea level and is overlooked by Tolkin Peak and Mount Janes, two hills.
Rosalie was founded in 1886 as a mining town for gold rumored to be found along Rucani's southern flank. Despite the volcano having been in an eruptive phase of over a century the area had been settles by indigenous peoples who lived off of farming the rich volcanic soils along the volcano's flanks. The town sits in a long valley, the Broad Valley, where elevation varies from about 4000m at the bottom and 4400m at the top. A particularly eruptive period in the spring of 1912 led to dangerous lahars that buried much of the town and led to 150 deaths. Rucani ended it's long eruptive phase in 1938 but an explosive eruption in 1940 again led to lahars and mudslides, destroying the road up the volcano and mine, killing over 500 people and washing away parts of the town. Mining ended in the 1980s and Rucani was made a natural reserve in that period, leading to an economic downturn in the town.
Holy Faith is a town in the central part of the county, located near the Holy Faith Mine. It has a population of 2750, with almost all people involved in mining or work associated with it. Located at 4990m altitude, it is an exceptionally high mountain town known for cold weather year round which has averaged 1.1°C/34°F and can reach double-digit freezing temperatures during three months of winter. The town was focused on silver mining in a more artisanal method, but in the 1950s and 1960s moved to focus on commercial galena/lead mining with silver as a byproduct. A rise in price to about $9000 for the silver and lead ores in a ton of rock in the past ten years has led to a rise in population, from about 1500 in 2011 to over 2700 (est.) in 2020.
Tumbaca is a village with about 700 inhabitants. It is a small indigenous settlement which has no plumbing or a market. Locals are involved in tourism in the area or mining at the Holy Faith Mine. Villagers have traditionally also picked ice from the nearby Crooked Mountain glacier for drinking water in the winters. It is one of highest permanently-settled places in the world, with at an altitude of about 5030m above sea level and has a very cold alpine climate.
The S-6 is the major route crossing the county (north to south). A portion of the S-19 crosses the southwestern corner of the county. The CR-1 is the main county route, which goes up and over the mountains. This route is the highest paved road in the FSA, with the road starting at 3300m above sea level, and portions of it at 5000m above sea level. Most of the high mountain roads are either gravel and dirt, and can become muddy and slippery in winter.
|S-19 - Huntington - S-6||97.7 km|
|CR-1 (Los Valles) - Tumbaca - S-6||46.1 km|