Euro-American traders began entering the Klamath area at some point between 1825 and 1827, where they worked as trappers for the Hudson's Bay Company. The Fremont National Forest was established in 1908 and was named for Captain John C. Fremont, who was sent to explore the area in 1843. After trade routes inland and to the Pacific were opened up in 1846, Fort Klamath was built in 1863 and the Klamath reservation was established. In the beginning the Klamath were able to keep Yamsay Mountain in their territory, but vast economic opportunities present was too much for the federal government to resist. Trappers may have begun the early movements of Euro-Americans into the area, but it was the harvesting of old growth ponderosa pine timber that was the real draw later in the 19th century. Ecological damage done by excessive logging was exacerbated by the introduction of sheep and cattle ranching, complete fire suppression, and other activities which remain visible on the landscape to this day.