On average, once a week I go hill-walking, because I love this as much as running.
The trouble is, how do I count it, when working out how much training for running I am doing? A hill-walk/scramble for me will be say 5-7 hours pretty intensive climbing/descending where for half of it, I am at least as breathless if not more, as when running on my easy runs. I used to count it as a rest day, but the fact is, I commonly feel like a rest day to recover from my hill-walking!
I am training for a 10K in December, and for example will spend 2 days hill-walking this week. Can I count it as equivalent to running miles in any way? - it certainly will put a limit on my running mileage for this week.