Foxes weigh a small fraction of what a mountain lion weighs. Yet, they love to share scent posts with mountain lions. Both red foxes and gray foxes show up at mountain lion scrapes regularly. They move with such agility as they mark the spot and then disappear.
One of the scrapes that I've monitored for years was visited by red foxes, gray foxes, and a mountain lion over the past month. It's a great example of this mix of foxes and lions that I see so often. Also, you can see and hear the crazy wind that has dominated our weather this winter. It's been intense.
Check out the video if you have time!