Dumbarton has an east and west fishing pier that both stretch 2,000 feet into the bay. They both have benches, water fountains, portable toilets, windbreaks and fish-cleaning stations. At the tip of each pier, a low platform puts you down closer to the water's surface. At high tide off the west-end pier, the water depth is 30 to 40 feet, while at low tide, it's just 10 feet. The east pier is 40 to 50 feet at high tide and 20 feet at low tide. Fish caught at the piers include shark, jack smelt, surf perch, starry flounder, bat ray (all no limit), sturgeon (limit one, 40-inch minimum, winter only), striped bass (limit two, 18-inch minimum). There are signs describing the types of fish that live in the Bay near the piers. No license is required. There are no facilities for bait and tackle or food.
The Park is set on 450 acres with an 83 acre lake. Easily catchable rainbow trout (1 to 3 pounds per fish) are planted October to April. In the early fall and late spring, catfish weighing between 1 and 2 pounds per fish are planted in the lake waters. Amenities include picnic areas, walking paths, tennis courts, fishing, snackbars and a golf driving range.
This park contains four bodies of water: Horseshoe Lake, Rainbow Lake, Willow Slough and Lago Los Osos. Fishing is only permitted in the Horseshoe Lake and Rainbow Lake. Daily Fishing Access Permit sales fund the planting of trout and catfish in Horseshoe Lake. Fishing is also available at Shinn Pond, just east of Quarry Lakes off Alameda Creek Regional Trail. Park visitors may only launch electric or nonmotorized boats.