Sodor Slate Quarry is a quarry located just south of the Blue Mountain Quarry on the north slope of Shane Dooiney. It first appeared in the sixth series. Mavis has been known to work here.
- Series 6 - The World's Strongest Engine and Buffer Bother
- Series 8 - James Goes Too Far (mentioned)
- Series 12 - Henry Gets it Wrong, Heave Ho Thomas!, Don't Go Back and Best Friends
- Series 13 - The Early Bird, Percy's Parcel, A Blooming Mess and The Biggest Present of All
- Series 14 - Charlie and Eddie, Victor Says Yes, Thomas in Charge and Thomas and Scruff
- Series 15 - Toby and Bash, James to the Rescue, Spencer the Grand, Kevin the Steamie, Wonky Whistle (stock footage) and Fiery Flynn
- Series 16 - Race to the Rescue, Thomas Toots the Crows, Thomas and the Sounds of Sodor and Whiff's Wish