Backcountry campsite 3L3 Lower Lamar is a designated overnight camping location in Yellowstone's Lamar River area, accessible via the Soda Butte/Lamar River trailhead approximately 5 miles away.

The site accommodates up to 12 people, allows wood fires, and features a food storage pole; it sits along the Lamar River with tree cover providing shelter.

Backcountry Use Permits are required and must be obtained in person no more than two days before arrival, with advance reservations available through the park's reservation system.