Backcountry campsite 2S3 is a designated Yellowstone National Park campsite on Slough Creek accessible via a 2.

4-mile hike from the Slough Creek Trailhead, featuring a cooking area shaded by mature fir trees, bear-proof food locker, and water access from the creek.

The site accommodates up to 8 people with a maximum 3-night stay (limited to 3 nights June 15-September 15), and requires advance backcountry permits obtained from Yellowstone's permit offices.

Located in a scenic valley with views of high peaks and meadows, the site offers two tent camping areas with outstanding vistas and is situated near the famous Slough Creek fishing meadows.