By Jillian Mackenzie

If you've visited the wilderness recently, you may have noticed something: people. People with walking sticks, people with selfie sticks, people with more people in tow. Surging numbers of visitors are hiking, camping, and all-around loving the outdoors. A whopping 330,882,751 of them spent 1.44 billion hours in our national parks in 2017—up 19 million hours from 2016. Great news, except that all this wilderness enthusiasm does come with a downside. "We're seeing record numbers of people connecting to nature, and that's a good thing," said Dana Watts, executive director of the Leave No Trace Center for Outdoor Ethics. "But with that comes an increase in the impact to the land."