Haha I did have this idea too. I even did a few park runs. It's also much easier to fit into a busy schedule - a satisfying ride of 100 km takes up a whole day!

Haha I did have this idea too. I even did a few park runs. It's also much easier to fit into a busy schedule - a satisfying ride of 100 km takes up a whole day! However it just didn't click. I can't explain it. Cycling is so enjoyable and feels wonderful. Including climbs. Running just feels slow and constant pounding. I wish I was a runner. I'm envious of you all. But I suppose I've spent 4 decades training my body to be a cycling not a running machine.