Reid State Park, established in 1946, protects 770 acres of oceanfront in Georgetown on Sheepscot Bay, and is known for having some of the longest and most varied sandy beach frontage of any park on the Maine coast. The park spans several distinct beach areas connected by a saltwater lagoon, giving visitors a choice between calmer, warmer lagoon swimming and the more bracing open Atlantic surf. Griffiths Head and Todds Head, two rocky headlands framing the beaches, offer short trails with sweeping ocean views and popular tide-pooling among the exposed rocks at low tide. The park's scale and variety, sand dunes, a lagoon, rocky points, and open ocean beach all within one property, make it one of the more geographically diverse coastal parks in the entire Maine system. With no campground, Reid functions as a day-use park, but its combination of multiple distinct beach environments makes it a full-day destination in its own right for visitors willing to explore beyond the first parking lot. Its location on the Georgetown peninsula, somewhat off the main coastal Route 1 corridor, keeps it slightly less crowded than more easily reached beaches like Popham, despite its comparable scenic quality.