Mountain biking is a great way to get outdoors, enjoy some fresh air and scenery, and get some exercise. However, like with any activity, there is such a thing as too much mountain biking.
If you find that you are spending more time on your bike than you are socializing or doing other activities that you enjoy, it may be time to cut back. Mountain biking should be something that enhances your life, not takes over it.
Additionally, if you find yourself feeling anxious or stressed when you can't go riding, this is also a sign that you are mountain biking too much. Remember that riding is supposed to be fun! If it's starting to feel like a chore, it's time to take a break.
Finally, if you are consistently tired and sore after rides, this is another sign that you need to dial back your mountain biking. Your body needs time to recover from exercise, and if you're pushing yourself too hard on the trails, you won't be able to ride as often (or as well) as you'd like.
Take some time to reassess your relationship with mountain biking and make sure it's something that brings joy into your life. There's nothing wrong with taking a break from riding every now and then - your body (and mind) will thank you for it!