Summer may be winding down in the Northern Hemisphere, but there’s still time to get out there and take a hike, spend some time outside, and even pitch a tent. The very cool website Hipcamp —the Airbnb for campers—offers a far-reaching, searchable database of more than 300,000 campsites in the United States. The so called “landsharing” platform now covers all 50 states. Founders Eric Bach and Alyssa Ravasio have greatly expanded Hipcamp’s reach by providing financial incentives and technical help so that property owners can list their land for camping.