The Bedfordshire Steam & Country Fayre 18th & 19th September 2004 was the 46th Annual Rally organised by the Society, and the ninth held at Old Warden Park.

There were over 130 engines in attendance of which many had "stopped-off" on their way to the National Traction Engine Trust's 50th Anniversary Road Run, at Hollowell in Northamptonshire, the following weekend. Many of these engines were making their first trip to Old Warden and came from far and wide. From the North, Michael Walters made the trip with his 1926 Garrett Undertype wagon, which once worked only 25 miles from the site. Roy Wakefield attended with his Mann tractor, which was joined by two Mann Wagons; Pat Jenkins recently restored example and Pete and Sue Lyons 1916 wagon in Pimin & Sons colours. Making a first visit from the South West were McLaren Ploughing Engine "Hero", Burrell Showman's Road Locomotive "Star", Aveling & Porter XA3 Tractor "Bo Peep" and the last Garrett 4CD to be built, "Lesley".