The Sodor Hay Company, also known as The Hay Fields, is a large area of land that is specifically used for farming and most importantly, used for keeping and storing hay. The Old Station is situated nearby.
In the summer, some workmen arrive at the fields and break up the hay. After they have broken up the hay, they leave it in the sun to dry up. Once the hay has dried up, Percy and Toby arrive with some trucks, the workmen load up the hay into their trucks and they take the hay to other farms on the Island of Sodor, like McColl Farm. Later on, the area became quite old, as Gordon found out while he was taking a VIP past the farm on the way to Wellsworth, which was making the ride very uncomfortable for the VIP. When Tiger Moth, the rude bi-plane went missing, Sir Topham Hatt joined the search party with Harold the helicopter and his pilot and after searching around Sodor, they eventually found Tiger Moth, stuck in one of the hay fields. Sir Topham Hatt got out of Harold and spoke severely to Tiger Moth's pilot.
- Jem Cole was once seen working amongst the gang at the hay fields.
- In the fifth season episode, Thomas and the Rumours, a playground of a school was shown situated next to the buildings on the fields.
- The buildings on the fields are built similar to the buildings on McColl Farm.
- For the ninth and tenth seasons, the fields has gained less space of a field and hay bales has replaced hay stacks.