Eastside Group Campground is a reservable group site on Sage Hen Reservoir (elevation 4,800 feet) that accommodates up to 50 people and 10 vehicles, with picnic tables, campfire rings, and partial lake views surrounded by Ponderosa pine and fir forest.

The campground provides access to boating and fishing on the reservoir, plus a 4-mile non-motorized loop trail around the lake; note that potable water and restrooms are not available at this site, though a campground host is located at nearby Antelope Campground.

The facility is typically open mid-May through late September and is accessed via Forest Service roads from Ola, Idaho.