When visiting friends ask me how Bangkok is laid out and what the best way to get around is, I tell them one thing: buy cards for the BTS (skytrain) and MRT (subway), fill ’em with cash, and you’re golden. Bangkok is a city that – at least since the BTS opened in 1999 – has expanded, grown and evolved very much in line with the routes that the electric trains take, as many cities do. But I also usually tell my friends that, unless they want to be particularly adventurous in Bangkok, almost everything they could need – save for a few major attractions – will likely be within 2km of the BTS or MRT. So I started to wonder – what areas does that actually cover? With the help of Google Maps and Photoshop, I decided to find out.

As of this post (mid-2013), Bangkok only has two BTS lines and one MRT line, but that’s changing fast. There are several new lines under construction (which I’m going to write about in a future post soon), but for now, the Sukhumvit line and the Silom line are where most of the clubs, restaurants, malls and nicer condos are located – at least the ones that most foreigners frequent. Of course, Bangkok has many, many very worthwhile attractions that are nowhere near a train line but a very large percentage of the socializing, carousing, eating, drinking and sleeping that an average Bangkok expat does goes on within 2km of the train lines. As an example, let’s look at Thong Lor station, a popular stop in a neighborhood known for it’s foreign population, among other things.

An approximately 2km radius from Thong Lor BTS station.

An approximately 2km radius from Thong Lor BTS station.

Of course, the only boundaries that really matter here are the top and bottom ones, as the left and right sides of the circle will expand in line with the BTS track, but I’d say this is pretty accurate. Not many foreigners I know live down by “Grottino Residence”, and ditto for the area up past Petchburi. Now let’s take a look at the entire rail network:

Zoomed out a bit.

Zoomed out a bit.

Here we can see the full extent of the 2km limit, which covers a pretty wide swath of the city. Let’s zoom out a bit more:

Zoomed out space station-style.

Zoomed out space station-style.

This map will look much different in 10 or so years once all the train lines are well on their way to being completed (I hope), but for now…yeah, I’d say the estimate I give my friends is about right.