Hollis Times Hollis, NH Other Attractions Hollis Flea Market Largest Open Air Flea Market in NH. We have 400 + vendors, spread over 15 + acres, large and diverse crowd of shoppers. Open on Sundays April-October 6:00am-- Hollis, NH Businesses Overlook , The Course Access: PublicHoles: 18Reserve Advance Tee Times: 7 Hollis, NH Golf Courses Overlook Golf Course Hollis, NH Golf Courses Silver Lake State Park Hollis, NH State Parks