I scoped them from the public road (CR 8).
They appear as Trumpeter Swans to me, but I remember some dizzying dialogue on CoBirds about Swan ID a year or so ago, so I'll say this: vs. Tundra Swan, I saw a bird seemingly taller in the water, a longer and straight bill, no yellow on the lores, and a smoothly curved back that was slightly grayish. There were four, very close to the south end where I was standing, I did get some photos.
Dan Stringer
Larkspur, CO