This is optimistic to the point of being close to a lie. Most people walking for an hour are going to burn closer to 250-300 cal. At the pace and terrain to double this you're not really "walking" anymore, and it's certainly not "easy". The idea of "exercising your way out of overconsumption" is entirely flawed and disproven.
A quick google search results in a range from 400-600cal/hr for brisk, hilly walks. You could also use the word "hike" but that requires nature which some people don't have access to.
>The idea of "exercising your way out of overconsumption" is entirely flawed and disproven.
Obvious one would still be attempting to reduce calorie intake throughout this scenario. But for the people who say "exercise just doesn't make a difference in my weight loss" - that is indeed flawed. You can absolutely exercise your way into a deficit. Perhaps you haven't had that experience. To that, I would say your workload is probably not high enough to experience it.