Yellow River Marsh, State park in Santa Rosa County, US.

Yellow River Marsh Preserve State Park spreads across Garcon Peninsula, featuring extensive wet prairies that lie between Escambia Bay and Blackwater Bay in northwestern Florida. The terrain consists mostly of marsh and swamp vegetation growing on flat land crossed by water channels and natural waterways.

Yellow River Marsh Preserve State Park lies on Garcon Point, a peninsula between Escambia Bay and Blackwater Bay south of Milton. The preserve protects wet prairie and marsh on the point where the Yellow River, rising in Alabama, reaches Pensacola Bay. Public access is from Dickerson City Road, with a small parking area and gazebo; a second tract lies along County Road 191 near Blackwater Bay.

The park is named after the Yellow River, which rises in Alabama and empties into Pensacola Bay. On County Road 191, about a mile north of its junction with County Road 281, the preserve runs along both sides of the highway on Blackwater Bay. Visitors come for birding, hiking, picnicking and wildlife viewing.

Access to the park comes through Dickerson City Road, where visitors find a parking area and a viewing gazebo for nature watching. The flat landscape and marked trails make walking easy, though visitors should wear sturdy shoes since the ground remains wet and swampy in places.

The park's wet pine savannas support one of Florida's richest concentrations of pitcher plants, which trap and digest insects in their tubular leaves. The soil is nutrient-poor, so the plants supplement their diet with prey. The park is also a noted birding and wildlife-viewing site on Blackwater Bay.