The eggs did seem to be connected together by a thin jelly-like substance. They broke apart, but not as easily as I would expect single eggs to do. You can see some little silky looking fibers in all of the pictures (I'll post a couple more). I thought it was an alga, and maybe it is. Can you see the silk you refer to? One picture shows several dead insects entangled in the mess, which was why I hadn't posted it to begin with. Jon Yuschock also thinks the other shot is an adult midge, and I'm tending to agree with you both now. I went back looking in the same place yesterday, and could find neither adults nor eggs to get better shots. Mosquitoes are still out in force here, and they find every square inch of skin that isn't covered, and a few that are, but that's no reason to preclude midges. If no one objects, I'll tag them and the adult as chironomidae. Maybe some expert can identify them, especially the adult, a little further. Thanks to all of you.

Midges tend to place their eggs masses on or attached to something- like floating dead insects. The silky threads are usually visible to the naked eye (at least out of the water), but very thin, like fine spider-silk. Chironomidae sounds like a good bet to me.

So I'm thinking they're Aedes? I think they lay eggs singly, and are common in the Rockies. These were scooped from a pretty high mountain lake.