The railway operates a variety of live steam, battery electric and petrol/diesel powered locomotives.

Importantly starting the in mid-1960s the original 1" x 1/2" steel 'rail' was replaced with 14 lb/yard rail recovered from disused quarries, railways and tramways.

[2]) The mainline was significantly expanded in the 1980s to extend down to the edge of the Eltham Lower Park, (called the outer circle) within sight of Main Road and passing motor traffic.

The full mainline is now 1.92 km (1.21 mi) long and takes about 12 minutes to complete a journey, passing through two tunnels and over a number of bridges.

[5][6] In 2015, Diamond Valley Railway applied to open a second circuit to the south of the current track.

[10] Special events timetabling, such as night running (usually in March each year),[11] are also scheduled and private bookings can be made.