Hiro's Hideout is a siding where Hiro was left when he began to break down. It is located in the Whistling Woods and is near The Duke and Duchess of Boxford's Summer House on the Ulfstead Branch Line. Thomas rediscovered Hiro here.
Thomas later visited the place to find spare parts for his friend, but he got himself stuck.
- According to the DVD Fellow Hiro Special Care, it is stated that the hideout is on Edward's Branch Line.