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Region

Peninsula

Base on the Caltrain line if you want a quieter, cheaper-feeling stop than San Francisco and can reach the coast by car; otherwise sleep in the city.

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Key facts · United States

Best months
Apr–May, Sep–Oct
Visa
Depends on your passport
Currency
US dollar (USD, $)
Language
English
Plugs
A · B · 120 V
Time zone
Six zones: UTC−5 to UTC−10
Month by month hereIn detail ↓
Rules in force · 11Crossing between the US, Canada and Mexico by land needs …Cannabis is legal in Canada and in many US states, but ta…
  • North America ↗Crossing between the US, Canada and Mexico by land needs your passport even on a day trip; rental cars need the company's written permission to cross, and most US and Canadian rental insurance stops at the Mexican border.
  • North America ↗Cannabis is legal in Canada and in many US states, but taking any amount across the US, Canadian or Mexican border is a federal crime — including edibles and vapes.
  • North America ↗The busiest US and Canadian national parks need timed-entry, campsite or lodge reservations in summer; release dates are months ahead.
  • United States ↗Check whether you need an ESTA (Visa Waiver Program) or a visa on the official CBP and State Department sites; apply only through esta.cbp.dhs.gov, not third-party sites, and allow time before you book.
  • United States ↗Several popular national parks use timed-entry or vehicle reservations in peak season; check each park's page on nps.gov and book on recreation.gov before fixing your dates.
  • United States ↗Medical care is very expensive for visitors; buy travel insurance with high medical cover before you fly.
  • United States ↗Tipping is expected: about 15–20% at sit-down restaurants and bars, and a tip for taxis, hotel staff and guides.
  • California ↗Agricultural inspection stations sit on major road entrances into the state; you may be asked about farm visits and fresh produce.
  • California ↗Outside San Francisco, Los Angeles and San Diego cores, a rental car is effectively required; book it before you land.
  • Bay Area ↗Clipper is the default transit card: tap on BART, Caltrain, Muni, ferries and most buses.
  • Bay Area ↗Bridge tolls are charged one-way (into San Francisco and on most crossings); plan loops to cross in the free direction.

The Peninsula is the strip of San Mateo County between San Francisco and Silicon Valley: two coasts, one commuter rail line, and about 30% of the land left as open space. It is not a sightseeing destination in itself. Base here if you want a mid-priced stop on Caltrain with SFO on the doorstep and you have a car (or accept rideshare) for the coast and the redwood parks; if your trip is city sights and no car, San Francisco is the better base. Pick a town on Caltrain, then day-trip north and south by train, and west only with wheels.

Sleep

Which bed, for how many nights, and what to do from it

Where to sleep

10 places in this region

Sleep base

Day trip

  • Half Moon BayCity guide

    The coast: harbour, bluffs, coastal trail. Foggy mornings most of the year; no train, so go by car or rideshare.

    Best May–Jun, Sep

    Open Half Moon Bay →

  • Menlo ParkCity guide

    Sand Hill Road and Stanford's western edge; a stop, not a base.

    Best Apr–Jun, Sep–Oct

    Open Menlo Park →

  • South San FranciscoCity guide

    Closest to the city; industrial, few reasons to sleep here.

    Best Apr–Jun, Sep–Oct

    Open South San Francisco →

  • San BrunoPlanned

    Sweeney Ridge trailhead and the Bay Discovery Site above the town.

    Page planned: listed so the region plan is complete.

  • Foster CityPlanned

    Lagoon suburb with bayfront paths; no Caltrain station.

    Page planned: listed so the region plan is complete.

  • BrisbaneCity guide

    Small bayfront town at the county's north edge, on the SamTrans 292 corridor.

    Best Apr–Jun, Sep–Oct

    Open Brisbane →

Also here

  • MillbraeCity guide

    The only place Caltrain and BART meet on the Peninsula; one BART stop from SFO.

    Best Apr–Jun, Sep–Oct

    Open Millbrae →

Night sequences

2 nights
San Mateo or Burlingame 2; one day San Francisco by Caltrain, one day coast by car
3 nights
Burlingame 2 + Half Moon Bay 1 if you want the coast at dawn
4 nights
San Mateo 2 + Redwood City 1 + Half Moon Bay 1, with a Stanford/Palo Alto half-day
  • US-101 is slow in both directions at rush hour; I-280 is longer on paper but usually faster between San Francisco and Palo Alto.
  • Coast fog can sit over Half Moon Bay until noon in summer while the bay side is sunny — plan the coast for the afternoon.
  • Most Peninsula towns are car-oriented outside their small downtowns; check the walk from your hotel to the station before booking.

Day-trips door to door

ToFromDoor-to-door p50Last returnNote
San FranciscoSan Mateo45 min~1 AM (10 PM Sun)About 30 minutes by Caltrain to 4th & King, then add a Muni ride or a 25-minute walk to reach downtown — budget 45 minutes or more door to door. SamTrans 397 runs late-night service between San Francisco and Palo Alto along the El Camino corridor; check its current schedule.
Half Moon BaySan Mateo40 minunknownHighway 92 over the ridge; no train, so a car or rideshare is required. Weekend traffic on 92 backs up from mid-morning.
Palo Alto / StanfordRedwood City25 min~1 AM (10 PM Sun)Caltrain to Palo Alto then a campus shuttle or 25-minute walk to the Main Quad.
San JoseSan Mateo70 min~1 AM (10 PM Sun)Caltrain express; the local stopping service takes about twice as long.

Bags between cities

No luggage forwarding on the Peninsula; many hotels hold bags on checkout day — ask before booking. Left-luggage options at SFO: check.

When and how

Months, arrival and passes

Seasons at a glance

From each city's month table

Pick a month to see where to go.

CountryJFMAMJJASOND
San Mateo
Burlingame
Redwood City
Half Moon Bay
Menlo Park
South San Francisco
Brisbane
Millbrae
Bay Area (country-wide)
Go: the good monthsFair: workable, mixedPoor: heat, rain or hazeAvoid: storms, floods, closuresno data yet

Computed from each country’s own data; hover a country name for the source. Advisory countries are left out.

Climate strip

Month by month
ZoneJFMAMJJASOND
Bay side (San Mateo, Redwood City, Palo Alto)El Camino Real corridorcoolcoolokbestbestokokokbestbestokcool
Coast (Half Moon Bay)Pacific shore and Highway 1okokokokokokokokbestbestokok
best: dry, mildok: workablecool: jacket, grey
Bay side (San Mateo, Redwood City, Palo Alto)
Mild year-round; Redwood City runs a few degrees warmer than the rest. Rain falls mostly November to March — check.
Coast (Half Moon Bay)
Fog and wind most mornings; September and October are usually the clearest and warmest weeks — check.

May to October is the drier window and September–October usually gives the best combination of clear coast and warm bay side — check. Winter rain rarely blocks a trip but can close coastal trails.

Get in

Door-to-door p50, 2026 estimate
FromToHowp50Note
SFO (San Francisco International)MillbraeBART or SamTrans 292~15 minSFO sits inside the Peninsula; Millbrae is one BART stop away and links to Caltrain.
SFO (San Francisco International)San Mateo / Redwood CityBART to Millbrae then Caltrain~45–70 min doorA taxi or rideshare is 15–30 minutes and often simpler with bags.
OAK (Oakland)Peninsula townsBART to Millbrae, or cross the San Mateo–Hayward Bridge by car~70–100 min doorBay-crossing bridges are tolled; check the current rate.
San FranciscoSan Mateo / Palo AltoCaltrain from 4th & King30–50 minBuy on the app or tap Clipper; conductors check between stations.

Regional passes

Verdict first

Clipper card

buy

One card for Caltrain, BART, SamTrans and VTA; the discount on SamTrans local fares is automatic.

Caltrain day pass

check

Pays only if you ride three or more zones in a day; weekend fares are already capped lower.

Rental car

check

Needed for Half Moon Bay, the redwood parks and I-280; skip it if you stay on the Caltrain line.

Eat and move on

Regional food

Where and when it works
DishWhereTiming / trap
Burmese tea-leaf salad and noodlesBurlingame AvenueSmall dining strip, walkable from both Caltrain stations; book on weekends.
Taquerias and El Camino Real strip mallsRedwood City, San MateoCheapest reliable meals on the Peninsula; most close by 21:00.
Seafood chowder and crabHalf Moon Bay and Pillar Point HarborWeekend waits at the harbour; weekdays are calm. Check Dungeness season before planning a crab trip.
Farmers' market produceSan Mateo (Sat) and Redwood City (Sat)Morning-only; the coast farms sell at both.

Go next

Bay Area

Caltrain or BART north to San Francisco

The Peninsula is one arm of the Bay Area; the city and the East Bay are separate trips.

Marin County

Caltrain to San Francisco then ferry from the Ferry Building

Golden Gate Bridge and the headlands; a full day from the Peninsula.

Central Coast

Highway 1 south via Half Moon Bay, or US-101 to Gilroy

Santa Cruz and Monterey are the usual next stop; Highway 1 is slow but direct.

Lake Tahoe

I-80 east from San Francisco, 3.5–4 h

Snow chains may be required in winter; check conditions before leaving.

Open Bay Area Up to Bay Area

Deep dive

Photos, reading and every source

Sources