Mill Valley, Marin County, California. Land of towering coastal Redwood trees, the gateway to majestic Mt. Tamalpais, home to the impossibly fit and smart people with well-behaved, impeccably groomed dogs. Judging by the real estate market, everyone wants in to this nirvana by the Bay so they can drink the ambrosia of local hand crafted brews at Mill Valley Beerworks. It may look like perfection and homogeneity on the outside but the neighborhoods in this hot hamlet are as distinct and quirky as the people. So here's the 411 on the 94941, my guide to micro-climates and who to expect next door.