The Gardiner River is a river located in the northwestern region of Wyoming, USA. It flows through the scenic landscape of the Yellowstone National Park and is known for its clear waters and beautiful surroundings. The river is approximately 30 miles long and serves as a tributary to the Yellowstone River. The Gardiner River is popular for various recreational activities, including fishing, kayaking, and wildlife viewing. It is home to diverse species of fish, such as trout, and attracts visitors who enjoy the natural beauty of the area. The river also plays a vital role in the local ecosystem.