AllTrails is a digital guidebook for outdoor enthusiasts, providing trail maps, reviews, and photos for over 100,000 trails across North America. The company was founded in 2010 by Russell Cook and is headquartered in San Francisco, California. AllTrails offers both free and paid versions of its app, with the paid version providing additional features such as offline maps and custom map printing. The company has raised over $75 million in funding and has over 20 million registered users.