The park, about 336 acres in size, has a six lane launch ramp, over 140 campsites and areas for picnicking and swimming. The visitor center is open Saturday and Sunday and can open by arrangement with the park staff. Inside are displays on the cultural and natural history of the Delta. Day use areas include the Windy Cove windsurfing access, the group picnic area located at the Ramadas, and Seven Mile Slough picnic area. The group picnic facility and Seven Mile Slough day use area close at sunset. Windy Cove closes at the hour posted at the entrance road to Windy Cove.

Seven Mile Slough Picnic Area includes picnic tables, barbecues and drinking water. New restroom facilities were completed late in 1997 and include flush toilets and outdoor cold showers. Seven Mile Slough''s swim beach has lifeguards from Memorial Day through Labor Day. Ample parking is close to the beach. The Ramadas have shaded picnic structures with large barbecues, picnic tables, water and trash receptacles. A large open grassy area is adjacent to the site for games. The closest restroom to the Ramadas is located north of the swim beach along Seven Mile Slough.

The park is a high use recreation area which receives heavy use from May through October. The late fall, winter and early spring months are much slower paced at the park and offer some of the best fishing opportunities of the year.

The park is on Highway 160 a few miles south of the city of Rio Vista in Sacramento County. The park is located on the lower peninsular extension of Brannan Island, and is surrounded by the Sacramento River on the west, Three Mile Slough on the southeast, and Seven Mile Slough on the northeast.