Million dollar hwy is a good trip. You're not going to need 2 trips but I guess you could. Down and back through telluride gets you Dallas pass lizard head pass and the cool town of Rico on your way back through Delores. Gateway and 141 is epic....the loop down through creeds and lake city is awesome you get to do slumgullion pass which has an awesome overlook. When you come out come up through Trinidad and over to laveta you will go through a town called cuchara. That is a great ride most people miss when coming here to Colorado they go to Chama and come in that way to pagosa. Which is also epic over Chama pass and the old Toltec railroad. (Still running). There r so many her in Colorado it's hard to do in short trip but gateway is pretty spectacular.