Overview
The S20 is not a train that shouts for attention, and that is precisely its appeal. It threads through Ticino's suburban and lakeside geography connecting Castione-Arbedo to Locarno, doing the quiet, useful work of a regional service while incidentally passing through some genuinely lovely country.
This is a working train on the Rete celere del Canton Ticino, the S-Bahn-style network that keeps this corner of Switzerland moving without fuss. It is run by Treni Regionali Ticino Lombardia, and it rewards travellers who like their scenery served without ceremony — no dining car theatre, just windows, rhythm, and a changing landscape.
If you are based in the Bellinzona area and want to reach Locarno without hiring a car or negotiating road traffic around the lake, the S20 is the sensible, unglamorous, thoroughly pleasant answer.
Key facts
| From | Castione-Arbedo |
|---|---|
| To | Locarno |
| Operator | Treni Regionali Ticino Lombardia |
The route: from Castione-Arbedo to Locarno
The journey begins at Castione-Arbedo, a small station in the Bellinzona area of the canton, and heads toward Locarno on the shore of Lake Maggiore. It is a regional link rather than a long main-line haul, but it covers a shift in character worth noticing: you leave behind the flatter, more built-up valley floor around Bellinzona and move gradually toward the softer, lake-touched air of Locarno.
Ticino's landscape does a lot of the work here. Expect a mix of valley settlements, cultivated land, and the gradual introduction of hills and greenery that signal you are approaching the lake district. It is not a dramatic high-alpine crossing — it is a more intimate, human-scale journey through a part of Switzerland that feels distinctly Italian in temperament even as the trains run with Swiss precision.
Timetable and how to book
As with any service on the Rete celere del Canton Ticino, timings on the S20 vary by season and by the day's schedule pattern, so do not rely on assumptions carried over from a previous trip. Always check current departures directly with the operator, Treni Regionali Ticino Lombardia, before you travel.
Booking regional services of this kind is generally straightforward and geared toward walk-up travel rather than advance reservation, but specifics on ticketing, validity and any seasonal adjustments should be confirmed with the operator's own channels. Treat this as a turn-up-and-check-the-board journey, with the caveat that it is always worth confirming the day's timetable before you set off, particularly outside peak periods.
Fares and classes
Regional trains of the S20's type typically offer a distinction between a simpler, more functional class and a slightly more comfortable option, with differences usually expressed through seating comfort and a somewhat quieter, less crowded carriage environment rather than through separate services or added extras.
No fare information is given here — and rightly so, since fares on this network change and should always be checked directly with Treni Regionali Ticino Lombardia before travel. What matters for planning purposes is simply that a choice of comfort levels is likely to exist, so travellers with a preference for more space or a calmer carriage should ask about it when booking or boarding.
Which side to sit for the best views
Because the S20 moves from the inland Bellinzona area toward the lake at Locarno, the more scenically rewarding side of the carriage will generally be whichever one faces toward the emerging lake and hill scenery as you near your destination. Without fixed landmarks to point to beyond what is confirmed here, the general rule for this kind of Ticino journey is to prioritise the side away from any parallel road or rail infrastructure, which tends to give an uninterrupted view of the countryside.
As with any short regional run, the view rewards patience rather than a fixed seat number — keep an eye out as the landscape opens up in the later stages of the journey toward Locarno, when the lake setting starts to make itself felt.
Onboard experience
Expect the onboard feel typical of a well-run regional service in this network: practical, clean, and oriented toward comfortable window-gazing rather than any elaborate onboard entertainment. Panoramic-style windows are a natural fit for this kind of scenic regional run, letting the changing Ticino landscape do most of the work.
Don't expect a dedicated catering trolley or restaurant car in the manner of a long-distance intercity service — regional trains of this type are generally geared toward shorter journeys, so it is worth having your own refreshments to hand if you like to travel with a coffee or snack, especially if you plan to combine the S20 with a longer day out around Locarno or the wider network.
Best season to travel
Ticino changes noticeably with the seasons, and the S20's route through the region shifts along with it. Spring and early summer bring a fresh, vivid green to the hills and valley land around Bellinzona, while high summer gives the Locarno end of the journey its full lakeside character, with long light and a warmer, more Mediterranean feel in the air.
Autumn brings colour to the hillsides and a calmer, quieter atmosphere generally, which suits travellers who prefer their scenery without summer crowds. Winter is quieter still, with crisper light and a starker, more graphic landscape — less lush, but often strikingly clear, especially on cold, bright days.
Alternatives and onward connections from Locarno
Locarno functions as a natural hub for onward travel around Lake Maggiore and further into the wider Swiss and Italian rail networks, and arriving there by S20 sets you up well for whatever comes next, whether that is further exploration of the lake shore or connections deeper into the regional network.
If the S20 does not suit your schedule on a given day, it is worth asking Treni Regionali Ticino Lombardia about alternative regional services covering the same or a similar corridor, since the Rete celere del Canton Ticino is generally built around a pattern of interlocking regional lines rather than a single isolated route.
A short history and context note
The S20 belongs to the broader story of Ticino's regional rail development, in which a patchwork of local lines has gradually been folded into a more coherent S-Bahn-style network under the Rete celere del Canton Ticino banner. This shift reflects a wider European pattern of turning older, standalone regional railways into integrated, clock-face style networks designed for everyday commuting and local travel rather than long-distance prestige.
Services like the S20, operated today by Treni Regionali Ticino Lombardia, are best understood not as heritage curiosities but as the modern backbone of how people in this part of Switzerland actually get around — unglamorous by design, and better for it.
Common questions
- Does the S20 require advance booking?
- Regional services of this kind are generally set up for straightforward, walk-up travel, but you should confirm current booking arrangements and any restrictions directly with Treni Regionali Ticino Lombardia before you travel.
- How long does the journey take?
- No specific timings are given here, as schedules vary by season. Always check current journey times with the operator before planning your trip.
- Is there a buffet or catering service onboard?
- This is a regional service, so it's sensible to assume there is no dedicated catering trolley, and to bring your own refreshments if you'd like something during the journey.
- Which side of the train has the best views?
- Favour the side facing away from any parallel road or infrastructure, particularly as you approach Locarno, when the lake and hill scenery becomes most noticeable.
- Can I connect onward from Locarno easily?
- Yes — Locarno acts as a useful hub for onward regional travel around Lake Maggiore and beyond, though you should check specific connections with the operator on the day.
On the map
Sources & method
- OpenStreetMap route=train (ODbL) — route
See our methodology for how Head Your Way sources and reviews travel data.