Boulder Forks is a popular 72. 4-acre fishing access site on the Upper Boulder River in Sweet Grass County, featuring campsites, hand launch access, and toilet facilities.

The site accommodates trailers up to 20 feet with a maximum 7-day stay limit and is open year-round, making it a convenient base for fishing and camping activities. Located 16 miles south of Big Timber via Highway 298, it offers difficult ADA accessibility.