I live in the Spokane/CDA area and am looking to visit some place beautiful and warm in January or February, preferably a national park where I can run outside in just a T-shirt or even shirtless. Even though places like Yellowstone are beautiful in the winter, that's not what I'm looking for. I was thinking of Big Bend, Zion, potentially even the Grand Canyon (will be cold at the top but was thinking of visiting the Havasu Falls). What are your recommendations?