I'm holding out hope that SL is found safely. I wrote yesterday about my experience running along part of that trail at night. A slight possibility could be a mountain lion attack. Mountain lions have been spotted in the general vicinity (a few miles southwest), especially near waterways, on animal cams. I'm leery about them whenever I run at night along trails (which is less frequently now), even within residential areas. I saw a family of bobcats about 18 months ago along such a trail at night. The challenge I see about a mountain lion theory could be - wouldn't a bicycle be found near the trail? I think the possibility is low on the list but still something to consider. Again, hopefully SL is found safe and there's a good explanation for him going missing. I'm planning to search the location this afternoon that I mentioned in post #33 above. As an aside, I saw someone that seemed out of place walking along a roadway last year and when I read a missing/vulnerable persons bulletin put out by the local (Longmont) PD, I reported a tip which I believe helped lead to the person being found safely in a nearby town (lost, confused and without their medications).
A mountain lion would not really explain why nothing has been found in regards to the bike or cell phone. Police have stated it doesn't seem to be a random disappearance or random crime, which leads me to believe they have information they cannot release yet because it could hinder their investigation.