We blow out the golf course irrigation system every year during the first week of November. We have had 70 degree weather and as low as 25 with a frost so hard the ground looked like this picture.
This year we showed up to work with a really fluffy and wet layer of snow. It melted by 11:00 but I caught this beautiful clubhouse sunrise picture.
It takes four of us until around 4:00 to go through the system twice and it is ready for the winter.