Lionel Modular Group, Inc: Running 2 "O" Gauge 3 rail mainline tracks and 1 Standard Gauge 3 rail track on one scale mile of track in Plano, Texas.N Crowd - Houston: A Houston-based N Scale model railroad club.Tex-N Modular Railroad Club: Plano, Texas (Dallas area). Information on club activities, and layout pictures.Texas Western Model Railroad Club: HO and HOn3 model railroad club in Ft. Worth, Tx. with 4000 square foot layout, 600 foot main HO, 200 foot HOn3.The Amarillo Railroad Museum, Inc.: Model railroad club based in Amarillo, Texas.