https://mutantyearzero.gamepedia.com/The_Iron_Serpent
The ancients used to travel in carts that ran along iron tracks that stretches in all directions.(1)
- “stretches” should be “stretch” or “stretched” imo, as the sentence is plural and in past tense. (“iron tracks” - “used to” / “ran”)
The second “that” (“that stretches”) could also be a “which” - this may create some variation in the wording and may or may not be more appropriate.