It’s no secret that outdoor adventures can be expensive. Between equipment rentals, gas, and entrance fees, the cost can add up quickly. However, that doesn’t mean you have to sacrifice the thrill of exploring the outdoors. In fact, some of the best adventures are the ones that don’t cost a dime. From hiking in national parks to exploring local trails, there are plenty of free outdoor activities that can provide an adrenaline rush and take your breath away.