Sweetwater County’s history is as rich and diverse as its mineral wealth and population. The area became a transportation pathway, with the early pioneer trails and the transcontinental railroad and today’s Interstate 80 serving as important trade and travel routes. Mining of coal and trona and the production of oil and natural gas have been and continue to be significant industries, contributing to the county’s economic wealth and to Sweetwater County’s position as one of the top three revenue producing counties in Wyoming.