From the source rules
Who goes first in Isle of Trains: All Aboard?
Dranda Games English rulebook

The rulebook does not specify how to choose the first player.
Rule details
After each turn, play passes to the player on the left.
Our interpretation
The initial-player omission was determined by reviewing the complete rulebook; it is not a publisher instruction to choose randomly.
Source & edition
- Isle of Trains: All Aboard rulebookDranda Games · Complete rulebook reviewed; Setup, How to Play, and end-of-turn instruction · Checked 2026-09-24Printed page references: 3, 4, 10Cited PDF pages: 3, 4, 10
Image: © Dranda Games / Asmodee and any cover-art licensors or artists (precise ownership not stated on product page) · Dranda Games / Asmodee
If there’s a tie
The rulebook doesn’t say.
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