Crags Road - Bulldog Road - Castro Crest MotorwayDistance: 8.3 milesElevation gain: 1,700 feetDifficulty: Moderately strenuousTime: 2:30-3:00Critters: a black lab/German shepherd mix.Thank the universe for hills. They may seem like a pain in the ass when you're climbing them, but they do you the following benefits: one, you get fit; two, you get a good …