OK, this probably shouldn't count because it was in July, and while my first attempt was on the bike, I didn't get to see the snow until I went back with the Xterra a few days later.
Starting out from the Leadville side of Mosquito Pass:
I got about this far:
But turned back:
A few days later I took Mrs. Doc and the Xterra over the pass from the Alma side:
And sure enough, you could see snow at the crest: