die Zugfahrt
train ride
A journey or a single trip taken by train.
Die Zugfahrt von Hamburg nach München dauert ungefähr sechs Stunden.
The train ride from Hamburg to Munich takes about six hours.

train ride
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train ride
A journey or a single trip taken by train.
Die Zugfahrt von Hamburg nach München dauert ungefähr sechs Stunden.
The train ride from Hamburg to Munich takes about six hours.

'Zugfahrt' (train ride) is simply made up of 'Zug' (train) and 'Fahrt' (journey, ride). So the word literally describes a ride by train.
Wir planen eine lange Zugfahrt durch ganz Europa.
We are planning a long train ride through all of Europe.
To describe the duration or course of the trip, the preposition 'während' (during) with the genitive is often used. The route is given with 'von ... nach ...' (from ... to ...).
Während der Zugfahrt habe ich ein ganzes Buch gelesen.
During the train ride, I read an entire book.
You 'macht' (take/go on) a train ride. A train ride can 'dauern' (last/take) a certain amount of time and is often described with adjectives such as 'lang' (long), 'kurz' (short), 'angenehm' (pleasant), or 'stressig' (stressful).
Am Wochenende machen wir eine kurze Zugfahrt an die Ostsee.
At the weekend, we're taking a short train ride to the Baltic Sea.
journey / trip
'Reise' and 'Zugfahrt' both describe being on the way somewhere. But 'Reise' is broader. It refers to the whole route or the whole stay in another place and does not say what means of transport you use. 'Zugfahrt' refers specifically to the part you travel by train. So a Zugfahrt can be part of a Reise. The words are easy to mix up when you travel by train. If you are talking about the vacation or the whole journey, 'Reise' fits. If you are talking about the ride on the train, 'Zugfahrt' is more precise.

Während der Zugfahrt las Tom ein Buch und schaute aus dem Fenster.
During the train ride, Tom read a book and looked out the window.
Unsere Reise nach Wien dauert insgesamt fünf Tage.
Our trip to Vienna lasts five days in total.