Many of my regular zen moments are like the ones mentioned above while hunting or fishing.
The one moment when I felt most at peace....
Two buddies and I where in Estes Park, Colorado for a couple of weeks circa 2000. We spent a good amount of that time fly fishing. We found a beautiful valley with several branches of a stream running through it and came up with a plan. We started fishing one end at daybreak with plans to meet at a hump halfway through for lunch. We toked up and hit the water. Once we got to the meeting place and ate, one of the guys pulled out some mushrooms. We ate those, rolled up a doobie, and looked out at the valley to see a herd of elk grazing where we planned to fish that afternoon. Probably 200 of them. We just sat there and enjoyed it all for a couple of hours, none of us said a word.
I felt closer to God at that moment than any other moment not counting the birth of my children. It was certainly more peaceful.