Guides — Transit
Getting around
Three train platforms, a bus corridor, a shoreline bike route, and why an e-bike turns four miles wide into a fifteen-minute city.
Checked August 2026
San Mateo is four miles wide. That is a twenty-minute bike ride end to end, ten on an e-bike, and a walk you could do before lunch — which means the interesting question here is not how far things are but what stands between them.
Two things do: US-101 and El Camino Real. Almost every complaint about getting around this city is a complaint about crossing one of them.
Read the rest of this page with one number in mind. Two miles is the longest distance anything on this site describes as impossible without a car, and two miles is under ten minutes on anything with a motor and handlebars.
On foot
Three parts of the city work on foot without qualification — downtown, North Central, and the newer blocks around Hillsdale station. In each, a train, a grocery store, and somewhere to eat are reachable without crossing a highway. That is a low bar and most of the Peninsula does not clear it.
Everywhere else, walking is pleasant and incomplete. The hills have no commercial street inside them, so a walk is a loop rather than an errand. East of 101 the destinations sit at distances laid out in the 1950s for drivers. The distinction worth learning before signing a lease is not walkable or not — it is whether anything you actually need is on your side of the arterial, and what it costs you to get to the other side.
Note the shape of that question. It is about crossings, not distance, and a crossing is cheap to solve. Which is why the honest version of "you'll need a car here" is usually "you'll need something faster than walking here," and those are very different sentences with very different price tags.
Sidewalk quality follows the same line as everything else on this site. The grid neighborhoods have continuous sidewalks on both sides. The hill neighborhoods have stretches with none at all, which dates the streets exactly: they were laid out for people who arrived by car.
Caltrain
Caltrain is the reason to live here rather than somewhere else on the Peninsula, and three stations sit inside the city:
| Station | Where | Notes |
|---|---|---|
| San Mateo | Downtown, by B Street | Most walkable; restaurants at the exit |
| Hayward Park | Concar / 16th Avenue | Fewer trains, easy parking |
| Hillsdale | 28th Avenue, by Bay Meadows | Rebuilt and elevated; the heaviest service of the three |
The line was electrified in 2024. Trains are faster, quieter, and more frequent than in the diesel era, and the timetable has been revised more than once since, which dates any remembered number, this page's included. Check the current one before planning a life around a departure.
The thing nobody mentions: the last northbound train is a real constraint on a San Francisco evening. It used to be the single fact that most shaped whether a household here ended up owning a second car — though a household that solves the station-to-door leg with an e-bike has usually solved the second-car question at the same time, for about a fortieth of the money.
The bus
SamTrans runs the El Camino corridor at a frequency that makes it usable without consulting a schedule. The 250 is the other one worth knowing: it runs east across 101 on roughly twenty-minute headways, which is the difference between a bus you plan around and a bus you just walk out and catch. Between them they cover the two crossings this page keeps calling difficult.
Everything else runs at a frequency that requires a schedule, and the hills are served thinly. Route numbers get renumbered; the corridors don't, so learn the corridors.
Buses here have front racks that take two bikes, which turns the hill problem into a one-directional one — ride down, put it on the rack coming back up. Check your e-bike against the rack's weight limit before relying on this; the heavier cargo models can exceed it, and finding that out at the stop is a bad time.
By e-bike and scooter
The largest change to how this city actually works, and the one most likely to be missing from advice written a few years ago — including, until recently, most of this site. An e-bike or a scooter collapses both of the things San Mateo is otherwise organised around: distance and elevation.
Distance first. Two miles is the number to internalise, because two miles is what this city puts between a house and almost anything — a platform, a grocery store, the other side of a freeway. On foot that is forty minutes and a decision. On an e-bike or a scooter it is under ten minutes, arrives without a shower, parks against a railing, and costs nothing to leave somewhere all day. Most of the trips described around here as "a drive" are that ride.
Elevation is where it matters more. Three hundred feet of climb is the reason Baywood, Laurelwood, and the Highlands all describe the return leg as the hard part, and a motor is precisely the thing that deletes it. The climb home from the station stops being the fact that decides whether you rode at all, which means the hill neighborhoods get to use the train like the flat ones do. For a household on the slope this is the cheapest available substitute for a second car, by a wide margin.
Two honest caveats. The shoreline and creek paths are shared with people on foot and posted for a pace well below what a Class 3 will do, so the Bay Trail is a pleasant way to cross the city and not a fast one. And secure parking is the real constraint rather than range — an e-bike is worth stealing, the stations vary in what they offer, and a good lock and a plan for where it lives overnight are part of the purchase, not an afterthought.
By bike
Under your own power, the flats are genuinely good cycling and the hills are honest work. The Bay Trail runs the length of the shoreline, is flat and almost entirely car free, and is the fastest north–south route east of 101 for anyone in no particular hurry. Alameda de las Pulgas is the ridge equivalent — two lanes, no trucks, and a steady stream of cyclists on weekend mornings.
Crossing 101 is the recurring problem. The overpasses are the pinch points and they are not equivalent: some have a sidewalk on both sides and a merge angled so drivers are looking where a person would be, and some have neither. The difference is worth a detour of half a mile, and everyone who rides here regularly has a preferred one.
El Camino is the other one. It is six lanes with a signal every block, and crossing it on a bike is a matter of picking a light and waiting, not of finding a gap. With a child on the back, I take the signal every time and I have never once regretted the ninety seconds.
By car
US-101 runs along the Bay: eight lanes, congested most of the day, fifteen minutes to SFO and an hour to San Jose that is sometimes ninety minutes.
I-280 rides the hills past Crystal Springs — longer in miles, often shorter in minutes, with the reservoir on one side and the ridge on the other. It is the route to San Francisco and the route to anywhere when 101 is red.
El Camino Real (State Route 82) is the mission road, now a commercial strip carrying grocery stores, dealerships, the good taquerias, and the DMV. Nobody enjoys driving it and everybody drives it constantly.
SR-92 is the east–west street. West, it climbs to Half Moon Bay in about twenty-five minutes, which makes dinner at the ocean a four-o'clock decision. East, it becomes the San Mateo–Hayward Bridge, seven miles that are flat and low for most of the crossing and then suddenly very high. It backs up westbound on sunny Saturday mornings and eastbound on weekday evenings.
The gaps
BART does not come here. The nearest stations are Millbrae to the north, which also takes a Caltrain transfer, and Hayward across the bridge.
For SFO, Caltrain to Millbrae and BART one stop works, and is slower than the fifteen-minute drive. Most people drive or take a ride-hail. A ride-hail is a car with someone else's hands on the wheel, and arrives in the same traffic and takes the same space at the curb, which is worth knowing when a household is doing the arithmetic on whether it needs a second one of its own.
That arithmetic is the thing this page most wants you to do properly. A second car on the Peninsula runs to five figures a year once insurance, registration, fuel, and a parking space are counted. An e-bike is a few hundred to a couple of thousand, once. The question is not whether a bike does everything a car does — it doesn't — but how many of your actual weekly trips are under two miles with a hill in them. In this city, for most households, it is nearly all of them.