Sylvia Lake Access is located at Lake Sylvia State Park near Montesano, offering public access to the lake for fishing, swimming, paddleboarding, kayaking, and non-motorized boating.

The park features a fishing bridge, picnic areas with shelters, camping facilities with 31 standard campsites (some with partial hook-ups), and kayak/paddleboard rentals available during high season.

Entry requires a Washington Discover Pass ($30 annual or $10 day use).