Originally Posted by Rich
Sometimes its easier to ask for forgiveness than for permission.
Holy shit, that is incredibly bad advice and a great way to damage the already tenuous relationship between boaters and private landowners.
Finding out who owns the land beneath Boulder Creek is easy, check it here with Boulder County's e-mapping: E-Mapping
A lot of the creek is in CDOT right-of-way. I doubt they care about trimming branches over the creek but the courtesy of a call is the right thing to do. Some of the ownership is Boulder County which is managed by Parks & Open Space. PM me about any work on County land and I can put you in touch with the right people. Right now Parks & Open Space is encouraging residents to become stewards of their public land so any volunteer efforts with staff guidance will be welcome.