The Green River in Wyoming is a popular destination for whitewater rafting enthusiasts. The ideal streamflow range for the river is between 1,500 and 5,000 cubic feet per second (cfs), which typically occurs between May and July. The river is rated as a class II-III, with some sections reaching class IV during high water levels.

The river runs for 80 miles through scenic canyons and valleys, with various segments offering different experiences for rafters. The most popular segment is the 7.5-mile section known as the "Day Stretch," which features exciting rapids such as Big Kahuna and the Lunch Counter.

Other notable rapids on the river include the Class IV rapid of Hells Half Mile and the Class III rapid of Little Joe. The river also features beautiful scenery, including towering canyon walls and abundant wildlife.

The Green River is subject to specific regulations to protect its natural resources and ensure the safety of rafters. Permits are required for all overnight trips on the river, and visitors must adhere to Leave No Trace principles and pack out all trash.

Overall, the Green River in Wyoming is a thrilling and scenic destination for whitewater rafting, with a variety of rapids and segments to suit all levels of experience.