Ellacoya State Park Ellacoya State Park is located in Gilford on the southwest shore of Lake Winnipesaukee, New Hampshire's largest lake. The 600 Gilford, NH State Parks DK Net Design Gilford, NH Other Attractions William H. Seed, broker Gilford, NH Other Attractions Fay's Boat Yard Gilford, NH Other Attractions Ames Farm Inn Gilford, NH Businesses