Almost exactly my experience, and with programming as well. I solved a bunch of problems while hiking in the mountains. Except that I don't miss coding because they are more architectural problems than pure coding.
That's what I usually have; I think up high level solutions or, in rare cases, low level solutions for hard problems and I blurt out them into a recording. That works fine. The problem is; I really want to keep walking and not go home and spend hours behind a computer entering and debugging these issues.