The main areas are Flat Tops (out of Glenwood, Dotsero, Rifle), Rabbit Ears (out of Kremmling), Wolf Creek (Pagosa Springs), Vail Pass (Vail or Dillon/Silverthorne), Grand Lake and Grand Mesa (Junction). The Mesa and Grand Lake are great for tours, lodges and groomed trails with a ton of off road riding areas. All of these areas are great.