I'm new here...Howdy all!
A little (bad) news for us Boulder area bassers. Sorry to be the one to bring it -on my first post.
The extremely low water in Sawhill and Walden Ponds coupled with the snow this winter caused substantial winter kills in at least the shallowest ponds.
Largest fish tend to die first (excluding carp) so bass were hit hard. I haven't perused all the ponds yet as some are still iced. Many bass were washed up, floating, and many are likely on the bottom. Even bullheads were dead in some ponds.
It's a good time to get an idea of how your fishing success compares to what was there to be caught though. The largest bass I found was a 20.25 inch. However, since large fish are apt to die first, the largest may have already been decomposing on bottom by the time the ice began to break up.
Such kills can be great actually by clearing the way for excellent growth in future years, but it'll take a few years for growth.
If you get to the ponds in the next couple weeks let us know what you see. Would be nice to know which ponds were affected.