The San Luis State Park Recreation Area offers a variety of activities, including boating, camping, picnicking, fishing, and hiking, making it a popular family destination in the west central valley. Currently, an expansion of the Maderos boat ramp facilities is underway, which will improve boat access and day-use facilities at O'Neil Forebay.

O'Neill Forebay is renowned for its diverse recreational opportunities, such as boating, windsurfing, camping, and picnicking. However, it is the kayak anglers who find the forebay particularly inviting, as it is known for its abundant striped bass population, with fish up to 30 pounds not uncommon. The forebay also supports other species like largemouth bass, crappie, bluegill, and even the occasional white sturgeon.

All boat traffic, including kayaks, must travel in a counterclockwise direction around the buoys located in the center of the lake. Boaters should be aware of shallow areas along the southern shoreline, the catfish flats, and the mudflats. Additionally, boats and dogs are prohibited at North Beach.

Paddlers in kayaks will quickly discover the power of the wind at O'Neil Forebay. While paddling against the wind can be physically demanding, savvy kayakers can rig a sail to their craft, allowing the wind to assist them in covering more distance than they could under their own power alone.

The Medeiros primitive campsites are located along the southern shoreline of O'Neill Forebay that are available on a first-come, first-served basis.

Map of O'Neill Forebay