Alexandra KeninAlexandra Kenin is the founder of Urban Hiker SF, a hiking tour company that helps people explore the stairways, hills, hiking trails, and history of the San Francisco Bay Area. She is also the author of Urban Trails: San Francisco (Moutaineers Books, 2016). Visit her online at UrbanHikerSF.com or on Instagram, Facebook and Twitter @urbanhikersf. Read More Read Less