Soda Butte Creek is a pristine tributary of the Lamar River located in the northeastern corner of Yellowstone National Park, with portions extending into Montana and Wyoming. Flowing through one of the most beautiful valleys in Yellowstone, this small stream averages 20-30 feet wide at most points. Its headwaters begin near Cooke City, Montana at nearly 8,000 feet elevation, resulting in cold water temperatures year-round. The creek is primarily known for its native Yellowstone cutthroat trout fishery, though some sections also contain rainbow trout and cutthroat-rainbow hybrids. The Northeast Entrance Road parallels the stream for its entire length, providing excellent access points. Soda Butte Creek takes its name from a dormant geyser cone that overlooks the lower meadow section near its confluence with the Lamar River. With its spectacular mountain scenery and relatively healthy native trout population, it ranks among the most beautiful trout streams in the United States.