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Peninsula (Bay Area)

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The Peninsula region of the San Francisco Bay Area lies immediately south of the City and County of San Francisco -- reaching from its famous neighbor to the north into the high-tech region of Silicon Valley. San Mateo County is the main county in the Pennisula region. While many of the Peninsula's residents work and play to the north or south, the Peninsula has its attractions, including some beautiful wilderness areas.

Though the Peninsula technically extends from the Pacific Ocean to the San Francisco Bay, in practical use, it more commonly refers to the Bay side of the area. It contains few major cities or ports and the Santa Cruz mountains divide the region in half north-south, with a large wilderness area that's great for hiking and mountain biking.


Traveling from San Francisco to the South Bay, the main cities of the peninsula include:

Other destinations[edit]

Get in[edit]

By plane[edit]

The Bay Area has three major commercial airports:

  • The San Francisco International Airport (ICAO: SFO [5]) is on the Peninsula near Millbrae and San Bruno.
  • The San Jose International Airport (ICAO: SJC) is at the bay's southern end between Santa Clara and northern San Jose.
  • The Oakland International Airport (ICAO: OAK) is across the bay near Alameda and southern Oakland.

All three airports are served by public transportation. The regional metro-rail service BART runs directly to SFO and connects to the commuter rail line Caltrain, as does the San Mateo County bus service SamTrans. The East Bay bus service AC Transit and a connecting bus to BART, AirBART, run to OAK. Santa Clara County's Valley Transportation Authority runs a bus (Line 10) connecting SJC with Caltrain and that county's light rail and bus system.

Motorists can reach the Peninsula from OAK by crossing the bay on the Bay Bridge (Interstate 80, to the north), the San Mateo-Hayward Bridge (Highway 92, to the south), or the Dumbarton Bridge (Highway 84, farther to the south). From SJC, drivers can take Highway 87 to US-101 northward, although avoiding 101's rush-hour traffic is often recommended. (For longer trips northward, try the scenic, parallel Interstate 280.)

By car[edit]

Getting to the peninsula by car is easy, provided you can avoid the traffic. Be aware that reaching the peninsula via a bridge will incur a toll charge. These toll charges can be tricky to estimate, even for locals, so consider using this handy reference to know how much to pay and when: (Bay Area Tolls [6]).

Get around[edit]

By train[edit]


This commuter railroad runs up and down the peninsula between San Francisco and San Jose, stopping at most major towns and serving the San Jose International Airport (via a short transit bus at Santa Clara station). Some trains continue further south to Gilroy. It runs 7 days a week until about 1am (10pm on Sundays). If you've missed the last Caltrain, local bus service is available all night.


BART serves a small portion of the peninsula, with some trains terminating at either San Francisco Airport or Millbrae. Caltrain and BART connect at Millbrae.

By Bus[edit]


The San Mateo County Transit District runs extensive bus service throughout San Mateo county, plus overlaps in Palo Alto and San Francisco. Some bus routes run all night. Normal bus fare is $2.00, express buses are $5.00, and Clipper cards are accepted. Useful bus routes include:

  • 390 - Palo Alto Caltrain to Daly City BART, along El Camino Real. Stops at Millbrae
  • 391 - Redwood City Caltrain to downtown San Francisco, along El Camino Real
  • 397 - Combination of 390 and 391, late-night service. Stops at most Caltrain stations - useful for when Caltrain has stopped running.
  • KX - Express service from San Francisco to Palo Alto Caltrain, stopping at San Francisco Airport
  • 292 - Downtown San Francisco to San Francisco Airport


The San Jose VTA runs buses throughout Santa Clara County, starting in Palo Alto. Normal bus fare is $2.00, express is $4.00, and Clipper is accepted. Routes that serve the Peninsula include:

  • 22 - Palo Alto Caltrain to Downtown San Jose, along El Camino.
  • 522 - Express version of route 22

By car[edit]

The two main highways running down the peninsula are 101 and 280. If you are driving from San Francisco to Palo Alto or San Jose, take I-280. It is a beautiful drive, free of advertising, well above the wilderness area. If you must drive on 101, avoid rush hour - it will be slow in both directions. The drive along the coast on State Route 1 (the Cabrillo Highway) is a beautiful, yet slow drive.

By bicycle[edit]

Many streets throughout the Peninsula have designated bike lanes, helping make cycling on the peninsula safer and easier. Key north-south bike routes include Alameda de las Pulgas, Middlefield Avenue, and Cañada Road.

See[edit][add listing]

Do[edit][add listing]

Hiking in the Peninsula[edit]

About 30% of the Peninsula is nature preserve, parkland, or otherwise undeveloped. There are many opportunities for hiking and mountain biking, all a short drive away. The transition from the crowded town along the eastern coast to empty wilderness is a rapid one! Most parks are managed by the Mid-Peninsula Open Space District, while some are part of local towns or counties. Almost every park permits mountain biking, and most allow horseback riding.

Some excellent destinations for hiking include:

  • Monte Bello Open Space Preserve, [1]. Features open rolling grasslands and deep, cool river valleys. The views from atop Black Mountain can be excellent. Free.  edit
  • Purisima Creek Redwoods, [2]. A densely forested park, with large redwoods Free.  edit
  • Russian Ridge, [3]. Sweeping views of the Pacific Ocean and Silicon Valley. Excellent in late winter and early spring when the wildflowers are in full bloom. Great place to watch the sunset. Free.  edit
  • Sam McDonald Park, [4]. This park combines dense redwood groves adjacent to wide-open grasslands. A good choice if you can't make it to Muir Woods. $5.00.  edit

Other hiking links[edit]

  • San Mateo County Parks, [7].
  • Bay-area Hiker Guide, [8].

Stay safe[edit]

Be careful to check for ticks [9] after hiking in fields in the bay area. There is a high rate of lyme disease transmission in the Bay Area. If a bulls' eye rash develops at the tick bite site, immediately seek medical help and treatment with antibiotics.

Get out[edit]

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