ON A FALL EVENING IN San Francisco, roughly 1,000 twentysomethings are mingling inside the Folsom Street Foundry, a former industrial warehouse that now houses an event and performance space. Gatherings like this are everyday occurrences in the Bay Area, but tonight the attraction isn’t an IPO party or a meetup for Stanford programmers. This is Outdoor SF, an event put on by a group of small Bay Area outdoor brands. For $15, attendees get a beer, locavore appetizers, and the chance to hang with the founders of new companies like Rumpl (maker of “highperformance blankets”), low-cost sunglasses upstart Sunski, and Hipcamp, which offers an Airbnblike interface for campsite reservations. Later, a young ex plorer named Gregg Treinish, who founded the nonprofit Adventurers and Scientists for Conservation, will give a slide…
