Swallow Falls State Park is a public recreation area located on the west bank of the Youghiogheny River nine miles (14 km) northwest of Oakland in Garrett County, Maryland, in the United States. The state park features Maryland's highest free-falling waterfall, the 53-foot (16 m) Muddy Creek Falls, as well as smaller waterfalls on the Youghiogheny River and Tolivar Creek. The park is notable for its stand of old hemlock trees, some more than 300 years old, "the last stand of its kind in Maryland."

The Youghiogheny River, or the Yough for short, is a 134-mile-long (216 km) tributary of the Monongahela River in West Virginia, Maryland, and Pennsylvania. It drains an area on the west side of the Allegheny Mountains northward into Pennsylvania, providing a small watershed in extreme western Maryland into the tributaries of the Mississippi River. Youghiogheny is a Lenape word meaning "a stream flowing in a contrary direction".