Excuse me, is this a round-trip train ticket? Where do I board and where do I return? Thank you ?

It is round trip, starting from Zematt station, the final station is Gornergrat, a total of five stations, you can get off at each station, play and then get back on the train to continue going up, but you can only get off once at each station, the top of the mountain is 3100 Hotel, you can go to the hotel's observation platform to enjoy the view of the Matterhorn peak opposite, pay attention to the time of the last train. This timetable is available for reference now, get a new one when you contact Zermatt to buy tickets. This timetable is until April 2017, the times in winter and summer are slightly different, it seems that the first train in summer is at 5 am, and in winter it is at 6 am. I have some photos from that time to make you envious. I also found a map of Gornergrat, Zermatt, and Tasch for you, it's clear at a glance, the train route maps are all hand-drawn and very clear. I can help you understand in advance. If you are driving, please note that motor vehicles are not allowed to enter Zermatt town, you can only drive to Tasch, and then take the train from Tasch to Zermatt, and then transfer to the Gornergrat sightseeing train. Of course, you can also drive to Randa, but the train ticket from Randa to Zermatt is much more expensive than the train ticket from Tasch to Zermatt. If you are taking the train to Matterhorn, you can go directly to Zermatt.