- "Listen to me. There is nothing wrong with that tunnel. You stuck in it, because you tried to do rock and roll. Tunnels are not dance floors, and you are not a pop star!"
- — Sir Topham Hatt scolding Duncan
Rheneas Tunnel is a short, but curved tunnel where Duncan got stuck trying to do Rock 'n' Roll. Peter Sam also lost his funnel from a hanging icicle here. North of this tunnel was the incident when Skarloey was stuck in a landslide back in 1867. As the name suggests, it is located near the station, Rheneas. It is the Skarloey Railway's only tunnel.
The tunnel appeared in the Railway Series books The Little Old Engine and Gallant Old Engine as well as the fourth season of the television series.
Duncan stuck in the tunnel in the Railway Series
The same scene from the Railway Series recreated
The tunnel being repaired
Peter Sam without his funnel