The mountains call.Every other Saturday until the snow returns I head east save for one week when I indulge my weakness and spend the time hiking up passes and scrambling mountain peaks that are do-able without aid of climbing equipment.The Saturday treks start after three to four hours of sleep and a drive upwards of three hours to reach the Yosemite high country, Sonora Pass, Yosemite Valley or — this year at least — Carson and Ebbetts passes. Then after hikes sometimes pushing 10 hours and — as often as I can — net elevation gains approaching 3,000 feet, I head home.Some backpackers over the years call what I do “aggressive” day hiking. Most people I know have a simpler term for it — crazy.I know that Scott and Susi Heath don’t think I’m crazy.