Run the REM (QC, Canada)
The REM is a light metro rapid transit system serving Greater Montreal, which as of the opening of the A4 branch in November 2025, consists of 19 stations spanning around 50km. See https://rem.info/en/map for more details.
This route follows as closely as possible the REM network from end to end, specifically the A4 and A1 branches from Deux Montagnes to Brossard stations, north to south. Public transit is pretty convenient to get to/from start and finish!