Boston or Denver for finding a LTR?

24M, currently living in a smallish city in the northeast. For a variety of reasons I want to move and Boston and Denver are my top two. I'm outdoorsy and ski so both cities work for access to nature/mountains. Family in both cities. More friends in Boston. Career would be fine in both.

I'd love to live somewhere with a friendly, relaxed, down to earth gay community. Kind of leaning toward Boston but a little concerned is it would be more transient because of the number of students.

How is dating in these cities for somebody looking long term?