For many nature lovers, the only downside of a hike or rock climbing trip is the fact that it normally requires a car. There’s the guilt of polluting the air, and for those who live in the city and don’t usually drive, there’s also the logistical challenge of finding a car. All those hikers are in luck, because a new website and mobile app is designed to help hikers find good trails they can reach by public transportation.

Transit & Trails allows you to enter an address (for now, only in the San Francisco Bay Area, but more locations will be coming soon), and then view a map showing nearby trails and campgrounds. Clicking on the name of a trail shows more details, including the closest public transit; another link quickly opens up custom directions — both in a car and through public transportation. The driving directions even include an estimate of CO2 emissions, to further convince day hikers get on the bus or train.

Both iPhone and Android versions of the app are now available. Soon, the site and apps will also include reviews from users after visiting trails. The project is part of the Open Space Council, a nonprofit that promotes land conservation and works to bring nature in reach of all Bay Area residents.

Main photo credit: GuideGunnar/Flickr; graphic and video credits: Transit & Trails