Stanway Viaduct is the largest on a UK heritage railway
A heritage steam railway has announced plans to eventually extend its track so that it links with the main rail network.
Ian Crowder, from the Gloucestershire Warwickshire Railway, said there were hopes to extend the line to Broadway in Worcestershire and beyond.
The railway, known as the Honeybourne Line, is hosting a nine-day steam gala at Toddington Station, Gloucestershire.
About 10,000 people are expected to visit.
They will be able to take journeys across the Stanway Viaduct for the first time since 1976 after it reopened following a refurbishment.
The viaduct is the largest anywhere on a UK heritage railway.
Mr Crowder said: "Network Rail are enabling us to use the platform at Honeybourne in Worcestershire as part of their re-widening of the Worcester to Oxford line.
"That's exciting co-operation between a private railway and the national network and will enable us ultimately to bring trains perhaps off the main line to Cheltenham races for example."
The event marks the 175th anniversary of the Great Western Railway.