Mill Valley is a city in Marin County, in the North Bay region of the Bay Area of California. The city begins in the canyons and ridges at the base of Mount Tamalpais and extends into a broad valley that reaches the Richardson Bay portion of the San Francisco Bay.
Mill Valley Mill -- Not much remains of the original structure, but it's a pretty spot in a redwood lined riverbed. A railroad car from the Old Railroad Grade--the main route up Mt. Tamalpais for sightseers in the early-1900s--stands opposite the mill.
Frank Valley (Muir Woods) Road (Marin Transit #66, summer weekends and holidays only), Phone: +1 415 388-2596, . 8AM-sunset every day. $7.
Muir Woods National Monument. is home to 560 acres (2.2 km2) of unlogged stands of old-growth redwood trees (Sequoia sempervirens), and is one of the few remaining places where these trees (the tallest living things on the planet) can be seen in their full glory. Many of the redwoods are over 200 (60 m) feet tall, 10 feet (3 m) wide, and over 600 years old. The woodland is served by a number of board-walks and other walking trails where visitors can get a close look at the magnificent trees.
Budget options (a relative word in Marin County) can be found along Highway 101 -- the further north you go, the more reasonable they will be. Other, more romantic options are scattered on the mountain behind town.
Alpine Lodge 730 Panoramic Hwy and Echo Summit Lodge. Located on Mt. Tamalpais are open to California Alpine Club Members and their guests, Alpine Lodge is open as a hostel-style B&B on some weekends in July and August.
Tam Valley Bed & Breakfast, 508 Shasta Way, Phone: +1 415 383-8716, . $170-$190.
Holiday Inn Express, 160 Shoreline Highway, +1 415 332-5700, .
Acqua Hotel, 555 Redwood Hwy, +1 415 380-0400, . Easy highway access and rooms with a view of Richardson Bay.
Mill Valley Inn, 165 Throckmorton Avenue, +1 415 389-6608, . An intimate, small hotel tucked away in a redwood grove at the foot of Mt. Tamalpais, just steps away from the bustling town plaza.
There are a lot of Vacation Rentals by Home Owner (VRBO)  and Home Away  options available in this community as well, if one is interested in a more 'local' experience, people actually rent away their actual houses. There are great places usually very central to town and have great prices for weeks and nights!
Larkspur Hotel Mill Valley, 160 Shoreline Highway, ☎ 415.332.5700, . Located in Marin County and recently remodeled, this hotel offers complimentary trail bicycles, S'mores kits and have free fanny packs for your hike.edit
Mill Valley has a very low crime rate, thanks to high property values and insulation by other exclusive towns like Tiburon, Larkspur, and Corte Madera. Prevalance of dangerous crimes is low enough to actually induce stricter enforcement of traffic infractions, since the police would not have much to do otherwise.
Common sense should prevail, though. Do not hike alone when rambling across the trails in Mill Valley and Mt. Tamalpais. The likelihood of having a negative encounter during a hike is minimal, but you will benefit greatly with the aid of another person should you meet an unsavory character--animal or human--along the way.
This is a usable article. It has information for getting in as well as some complete entries for restaurants and hotels. An adventurous person could use this article, but please plunge forward and help it grow!