I lived in San Francisco for two years after college and absolutely loved running in the Presidio, Golden Gate Park, Crissy Field and Marin Headlands. Last week I drove to San Francisco for an all-day meeting and made sure to leave early enough to get a run in. I parked at Crissy Field and as always I marvelled at the spectacular view.The run was pleasant. I wound through the Presidio onto new trails. I meandered around to the Arguello gate and then back down to Crissy field. I rinsed off at the surf showers.Briefly, it was frigid.