The Grind, as it's known locally, is a popular but demanding trail located right on the city's back doorstep. Metro Vancouver estimates up to half-a-million people tackle the trail annually through its May-to-October season, with 25 to 30 evacuations taking place during that time.
http://www.vancouversun.com/travel/Vancouvers+Grouse+Grind+offers+easy+access+challenge/11156867/story.html