Wow...I used to fish in that lake when I was stationed out there at Ellsworth AFB....never saw a mountain lion though. Didn’t even consider it!
Lots of lions around here now. Even had one on our back deck earlier in the winter. Sightings are getting more and more frequent, as are the missing small pets reports. We live up in the “Hills”, not too far from Sheridan Lake, and see lots of tracks. With toddler grandchildren here often, we keep a close eye out.
Ten years ago they were extremely rare. Now they are all over the place and not just in the Black Hills. I sometimes wonder if someone raised and released a bunch, but that is just my own personal theory.