The linked-to page mentions:

> Infinite length Mazes: It's possible to create an infinitely long Maze (a finite number of columns by as many rows as you like) by only keeping part of the Maze in memory at a time and "scrolling" from one end to the other, discarding earlier rows while creating later rows.

> An easier way to make an infinite Maze is with Eller's or the Sidewinder algorithms, as they already make Mazes one row at time, so simply keep letting them add rows to the Maze forever.

My tiny obfuscated maze program at https://tromp.github.io/pearls.html#maze will print an infinitely long maze if you enter a negative height.